The material described by Mg10FeO11 is Caswellsilverite-like structured and crystallizes in the triclinic P-1 space group. There are twenty inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(10), one O(12), one O(17), one O(7), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(6)O6 octahedra, and edges with two equivalent Mg(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second Mg site, Mg(2) is bonded to one O(13), one O(18), one O(2), one O(4), and two equivalent O(9) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra, edges with two equivalent Mg(17)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Mg site, Mg(3) is bonded to one O(10), one O(14), one O(19), one O(3), one O(5), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(11)O6 octahedra, and edges with two equivalent Mg(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourth Mg site, Mg(4) is bonded to one O(15), one O(16), one O(2), one O(6), and two equivalent O(11) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra, edges with two equivalent Mg(19)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fifth Mg site, Mg(5) is bonded to one O(12), one O(16), one O(2), one O(20), one O(4), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and edges with two equivalent Mg(17)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixth Mg site, Mg(6) is bonded to one O(1), one O(13), one O(17), one O(23), one O(4), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(14)O6 octahedra, and edges with two equivalent Mg(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the seventh Mg site, Mg(7) is bonded to one O(14), one O(18), one O(2), one O(22), one O(5), and one O(6) atom to form MgO6 octahedra that share  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and edges with two equivalent Mg(19)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the eighth Mg site, Mg(8) is bonded to one O(15), one O(19), one O(21), one O(3), one O(5), and one O(6) atom to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(11)O6 octahedra, edges with two equivalent Mg(16)O6 octahedra, and edges with two equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the ninth Mg site, Mg(9) is bonded to one O(1), one O(10), one O(12), one O(20), one O(23), and one O(4) atom to form MgO6 octahedra that share  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(17)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the tenth Mg site, Mg(10) is bonded to one O(11), one O(13), one O(2), one O(21), one O(22), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the eleventh Mg site, Mg(11) is bonded to one O(14), one O(21), one O(22), one O(3), one O(6), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(19)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, and edges with two equivalent Mg(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the twelfth Mg site, Mg(12) is bonded to one O(15), one O(2), one O(20), one O(23), one O(5), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the thirteenth Mg site, Mg(13) is bonded to one O(12), one O(13), one O(16), one O(18), one O(22), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourteenth Mg site, Mg(14) is bonded to one O(12), one O(13), one O(23), one O(9), and two equivalent O(17) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(20)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifteenth Mg site, Mg(15) is bonded to one O(10), one O(14), one O(15), one O(16), one O(18), and one O(20) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixteenth Mg site, Mg(16) is bonded to one O(11), one O(14), one O(15), one O(21), and two equivalent O(19) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(18)O6 octahedra, and edges with two equivalent Mg(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the seventeenth Mg site, Mg(17) is bonded to one O(12), one O(18), one O(4), one O(9), and two equivalent O(20) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the eighteenth Mg site, Mg(18) is bonded to one O(10), one O(15), one O(19), one O(21), one O(23), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and edges with two equivalent Mg(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the nineteenth Mg site, Mg(19) is bonded to one O(11), one O(14), one O(16), one O(6), and two equivalent O(22) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(11)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, and edges with two equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twentieth Mg site, Mg(20) is bonded to one O(13), one O(17), one O(21), one O(23), one O(5), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and edges with two equivalent Mg(14)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(10), one O(17), one O(18), one O(4), one O(5), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra, and edges with two equivalent Mg(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Fe site, Fe(2) is bonded to one O(11), one O(16), one O(19), one O(6), one O(7), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra, and edges with two equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are twenty-three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), two equivalent Mg(6), and two equivalent Mg(9) atoms to form OMg6 octahedra that share corners with two equivalent O(8)Mg5Fe octahedra, corners with two equivalent O(13)Mg6 octahedra, corners with two equivalent O(20)Mg6 octahedra, edges with two equivalent O(10)Mg5Fe octahedra, edges with two equivalent O(17)Mg5Fe octahedra, edges with two equivalent O(4)Mg5Fe octahedra, edges with two equivalent O(7)Mg5Fe octahedra, edges with two equivalent O(12)Mg6 octahedra, and edges with two equivalent O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the second O site, O(2) is bonded to one Mg(10), one Mg(12), one Mg(2), one Mg(4), one Mg(5), and one Mg(7) atom to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra,  a cornercorner with one O(14)Mg6 octahedra,  a cornercorner with one O(21)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra, and  an edgeedge with one O(22)Mg6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third O site, O(3) is bonded to two equivalent Mg(11), two equivalent Mg(3), and two equivalent Mg(8) atoms to form OMg6 octahedra that share corners with two equivalent O(10)Mg5Fe octahedra, corners with two equivalent O(15)Mg6 octahedra, corners with two equivalent O(22)Mg6 octahedra, edges with two equivalent O(19)Mg5Fe octahedra, edges with two equivalent O(5)Mg5Fe octahedra, edges with two equivalent O(6)Mg5Fe octahedra, edges with two equivalent O(8)Mg5Fe octahedra, edges with two equivalent O(14)Mg6 octahedra, and edges with two equivalent O(21)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fourth O site, O(4) is bonded to one Mg(17), one Mg(2), one Mg(5), one Mg(6), one Mg(9), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra, corners with two equivalent O(23)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra, edges with two equivalent O(9)Mg5Fe octahedra, and edges with two equivalent O(20)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifth O site, O(5) is bonded to one Mg(12), one Mg(20), one Mg(3), one Mg(7), one Mg(8), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra, corners with two equivalent O(19)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and  an edgeedge with one O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixth O site, O(6) is bonded to one Mg(11), one Mg(19), one Mg(4), one Mg(7), one Mg(8), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(14)Mg6 octahedra, corners with two equivalent O(21)Mg6 octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, edges with two equivalent O(11)Mg5Fe octahedra, and edges with two equivalent O(22)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the seventh O site, O(7) is bonded to one Mg(1), one Mg(10), one Mg(18), one Mg(5), one Mg(6), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra, corners with two equivalent O(17)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra, and  an edgeedge with one O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighth O site, O(8) is bonded to one Mg(1), one Mg(11), one Mg(13), one Mg(20), one Mg(3), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(1)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra, corners with two equivalent O(14)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, and  an edgeedge with one O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the ninth O site, O(9) is bonded to one Mg(12), one Mg(14), one Mg(17), two equivalent Mg(2), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(10)Mg5Fe octahedra,  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, edges with two equivalent O(18)Mg5Fe octahedra, and edges with two equivalent O(4)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the tenth O site, O(10) is bonded to one Mg(1), one Mg(15), one Mg(18), one Mg(3), one Mg(9), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(21)Mg6 octahedra,  a cornercorner with one O(3)Mg6 octahedra, corners with two equivalent O(12)Mg6 octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra, and  an edgeedge with one O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the eleventh O site, O(11) is bonded to one Mg(10), one Mg(16), one Mg(19), two equivalent Mg(4), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(8)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, edges with two equivalent O(16)Mg5Fe octahedra, and edges with two equivalent O(6)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twelfth O site, O(12) is bonded to one Mg(1), one Mg(13), one Mg(14), one Mg(17), one Mg(5), and one Mg(9) atom to form OMg6 octahedra that share  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra, corners with two equivalent O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and edges with two equivalent O(20)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the thirteenth O site, O(13) is bonded to one Mg(10), one Mg(13), one Mg(14), one Mg(2), one Mg(20), and one Mg(6) atom to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(1)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and edges with two equivalent O(17)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fourteenth O site, O(14) is bonded to one Mg(11), one Mg(15), one Mg(16), one Mg(19), one Mg(3), and one Mg(7) atom to form OMg6 octahedra that share  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra, corners with two equivalent O(8)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, and edges with two equivalent O(22)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifteenth O site, O(15) is bonded to one Mg(12), one Mg(15), one Mg(16), one Mg(18), one Mg(4), and one Mg(8) atom to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(21)Mg6 octahedra,  a cornercorner with one O(3)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and edges with two equivalent O(19)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixteenth O site, O(16) is bonded to one Mg(13), one Mg(15), one Mg(19), one Mg(4), one Mg(5), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(10)Mg5Fe octahedra,  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, and edges with two equivalent O(11)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the seventeenth O site, O(17) is bonded to one Mg(1), one Mg(20), one Mg(6), two equivalent Mg(14), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra,  a cornercorner with one O(21)Mg6 octahedra, corners with two equivalent O(7)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra, edges with two equivalent O(13)Mg6 octahedra, and edges with two equivalent O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighteenth O site, O(18) is bonded to one Mg(13), one Mg(15), one Mg(17), one Mg(2), one Mg(7), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(8)Mg5Fe octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, and edges with two equivalent O(9)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the nineteenth O site, O(19) is bonded to one Mg(18), one Mg(3), one Mg(8), two equivalent Mg(16), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(14)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra, corners with two equivalent O(5)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, edges with two equivalent O(15)Mg6 octahedra, and edges with two equivalent O(21)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twentieth O site, O(20) is bonded to one Mg(12), one Mg(15), one Mg(5), one Mg(9), and two equivalent Mg(17) atoms to form OMg6 octahedra that share  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(1)Mg6 octahedra,  a cornercorner with one O(14)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, edges with two equivalent O(4)Mg5Fe octahedra, and edges with two equivalent O(12)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twenty-first O site, O(21) is bonded to one Mg(10), one Mg(11), one Mg(16), one Mg(18), one Mg(20), and one Mg(8) atom to form OMg6 octahedra that share  a cornercorner with one O(10)Mg5Fe octahedra,  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra, corners with two equivalent O(6)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, and edges with two equivalent O(19)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twenty-second O site, O(22) is bonded to one Mg(10), one Mg(11), one Mg(13), one Mg(7), and two equivalent Mg(19) atoms to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra,  a cornercorner with one O(3)Mg6 octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, edges with two equivalent O(6)Mg5Fe octahedra, and edges with two equivalent O(14)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the twenty-third O site, O(23) is bonded to one Mg(12), one Mg(14), one Mg(18), one Mg(20), one Mg(6), and one Mg(9) atom to form OMg6 octahedra that share  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(8)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra, corners with two equivalent O(4)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra, and edges with two equivalent O(17)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. is represented by the CIF card [CIF]
data_Mg10FeO11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.231
_cell_length_b   6.750
_cell_length_c   6.760
_cell_angle_alpha   107.441
_cell_angle_beta   97.541
_cell_angle_gamma   104.934
_symmetry_Int_Tables_number   1
_cell_volume   214.350
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Fe  Fe0  1  0.545  0.182  0.909  1.0
  Mg  Mg1  1  0.091  0.364  0.818  1.0
  Mg  Mg2  1  1.000  0.999  0.000  1.0
  Mg  Mg3  1  0.637  0.544  0.727  1.0
  Mg  Mg4  1  0.454  0.820  0.092  1.0
  Mg  Mg5  1  0.181  0.726  0.636  1.0
  Mg  Mg6  1  0.910  0.638  0.182  1.0
  Mg  Mg7  1  0.272  0.091  0.456  1.0
  Mg  Mg8  1  0.819  0.272  0.362  1.0
  Mg  Mg9  1  0.725  0.908  0.544  1.0
  Mg  Mg10  1  0.366  0.455  0.274  1.0
  O  O11  1  0.045  0.682  0.909  1.0
  O  O12  1  0.500  0.505  0.002  1.0
  O  O13  1  0.591  0.859  0.816  1.0
  O  O14  1  0.130  0.043  0.725  1.0
  O  O15  1  0.961  0.320  0.093  1.0
  O  O16  1  0.228  0.409  0.546  1.0
  O  O17  1  0.863  0.955  0.272  1.0
  O  O18  1  0.685  0.228  0.631  1.0
  O  O19  1  0.405  0.135  0.187  1.0
  O  O20  1  0.318  0.773  0.365  1.0
  O  O21  1  0.773  0.590  0.453  1.0
[/CIF]
.
The material described by Mg10FeO11 is Caswellsilverite-like structured and crystallizes in the triclinic P-1 space group. There are twenty inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(10), one O(12), one O(17), one O(7), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(6)O6 octahedra, and edges with two equivalent Mg(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second Mg site, Mg(2) is bonded to one O(13), one O(18), one O(2), one O(4), and two equivalent O(9) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra, edges with two equivalent Mg(17)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Mg site, Mg(3) is bonded to one O(10), one O(14), one O(19), one O(3), one O(5), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(11)O6 octahedra, and edges with two equivalent Mg(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourth Mg site, Mg(4) is bonded to one O(15), one O(16), one O(2), one O(6), and two equivalent O(11) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra, edges with two equivalent Mg(19)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fifth Mg site, Mg(5) is bonded to one O(12), one O(16), one O(2), one O(20), one O(4), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and edges with two equivalent Mg(17)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixth Mg site, Mg(6) is bonded to one O(1), one O(13), one O(17), one O(23), one O(4), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(14)O6 octahedra, and edges with two equivalent Mg(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the seventh Mg site, Mg(7) is bonded to one O(14), one O(18), one O(2), one O(22), one O(5), and one O(6) atom to form MgO6 octahedra that share  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and edges with two equivalent Mg(19)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the eighth Mg site, Mg(8) is bonded to one O(15), one O(19), one O(21), one O(3), one O(5), and one O(6) atom to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(11)O6 octahedra, edges with two equivalent Mg(16)O6 octahedra, and edges with two equivalent Mg(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the ninth Mg site, Mg(9) is bonded to one O(1), one O(10), one O(12), one O(20), one O(23), and one O(4) atom to form MgO6 octahedra that share  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(17)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the tenth Mg site, Mg(10) is bonded to one O(11), one O(13), one O(2), one O(21), one O(22), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the eleventh Mg site, Mg(11) is bonded to one O(14), one O(21), one O(22), one O(3), one O(6), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(19)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, and edges with two equivalent Mg(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the twelfth Mg site, Mg(12) is bonded to one O(15), one O(2), one O(20), one O(23), one O(5), and one O(9) atom to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the thirteenth Mg site, Mg(13) is bonded to one O(12), one O(13), one O(16), one O(18), one O(22), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the fourteenth Mg site, Mg(14) is bonded to one O(12), one O(13), one O(23), one O(9), and two equivalent O(17) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(20)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifteenth Mg site, Mg(15) is bonded to one O(10), one O(14), one O(15), one O(16), one O(18), and one O(20) atom to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixteenth Mg site, Mg(16) is bonded to one O(11), one O(14), one O(15), one O(21), and two equivalent O(19) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(4)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(18)O6 octahedra, and edges with two equivalent Mg(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the seventeenth Mg site, Mg(17) is bonded to one O(12), one O(18), one O(4), one O(9), and two equivalent O(20) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mg(12)O6 octahedra,  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Mg(2)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the eighteenth Mg site, Mg(18) is bonded to one O(10), one O(15), one O(19), one O(21), one O(23), and one O(7) atom to form MgO6 octahedra that share  a cornercorner with one Mg(11)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(4)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and edges with two equivalent Mg(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the nineteenth Mg site, Mg(19) is bonded to one O(11), one O(14), one O(16), one O(6), and two equivalent O(22) atoms to form MgO6 octahedra that share  a cornercorner with one Mg(10)O6 octahedra,  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(3)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Mg(11)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, and edges with two equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twentieth Mg site, Mg(20) is bonded to one O(13), one O(17), one O(21), one O(23), one O(5), and one O(8) atom to form MgO6 octahedra that share  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(2)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  a cornercorner with one Mg(9)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and edges with two equivalent Mg(14)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(10), one O(17), one O(18), one O(4), one O(5), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Mg(13)O6 octahedra,  a cornercorner with one Mg(14)O6 octahedra,  a cornercorner with one Mg(17)O6 octahedra,  a cornercorner with one Mg(18)O6 octahedra,  a cornercorner with one Mg(5)O6 octahedra,  a cornercorner with one Mg(8)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(12)O6 octahedra,  an edgeedge with one Mg(14)O6 octahedra,  an edgeedge with one Mg(15)O6 octahedra,  an edgeedge with one Mg(17)O6 octahedra,  an edgeedge with one Mg(20)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(6)O6 octahedra,  an edgeedge with one Mg(7)O6 octahedra,  an edgeedge with one Mg(9)O6 octahedra, and edges with two equivalent Mg(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Fe site, Fe(2) is bonded to one O(11), one O(16), one O(19), one O(6), one O(7), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Mg(15)O6 octahedra,  a cornercorner with one Mg(16)O6 octahedra,  a cornercorner with one Mg(19)O6 octahedra,  a cornercorner with one Mg(20)O6 octahedra,  a cornercorner with one Mg(6)O6 octahedra,  a cornercorner with one Mg(7)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(10)O6 octahedra,  an edgeedge with one Mg(11)O6 octahedra,  an edgeedge with one Mg(13)O6 octahedra,  an edgeedge with one Mg(16)O6 octahedra,  an edgeedge with one Mg(18)O6 octahedra,  an edgeedge with one Mg(19)O6 octahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Mg(5)O6 octahedra,  an edgeedge with one Mg(8)O6 octahedra, and edges with two equivalent Mg(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are twenty-three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), two equivalent Mg(6), and two equivalent Mg(9) atoms to form OMg6 octahedra that share corners with two equivalent O(8)Mg5Fe octahedra, corners with two equivalent O(13)Mg6 octahedra, corners with two equivalent O(20)Mg6 octahedra, edges with two equivalent O(10)Mg5Fe octahedra, edges with two equivalent O(17)Mg5Fe octahedra, edges with two equivalent O(4)Mg5Fe octahedra, edges with two equivalent O(7)Mg5Fe octahedra, edges with two equivalent O(12)Mg6 octahedra, and edges with two equivalent O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the second O site, O(2) is bonded to one Mg(10), one Mg(12), one Mg(2), one Mg(4), one Mg(5), and one Mg(7) atom to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra,  a cornercorner with one O(14)Mg6 octahedra,  a cornercorner with one O(21)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra, and  an edgeedge with one O(22)Mg6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third O site, O(3) is bonded to two equivalent Mg(11), two equivalent Mg(3), and two equivalent Mg(8) atoms to form OMg6 octahedra that share corners with two equivalent O(10)Mg5Fe octahedra, corners with two equivalent O(15)Mg6 octahedra, corners with two equivalent O(22)Mg6 octahedra, edges with two equivalent O(19)Mg5Fe octahedra, edges with two equivalent O(5)Mg5Fe octahedra, edges with two equivalent O(6)Mg5Fe octahedra, edges with two equivalent O(8)Mg5Fe octahedra, edges with two equivalent O(14)Mg6 octahedra, and edges with two equivalent O(21)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fourth O site, O(4) is bonded to one Mg(17), one Mg(2), one Mg(5), one Mg(6), one Mg(9), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra, corners with two equivalent O(23)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra, edges with two equivalent O(9)Mg5Fe octahedra, and edges with two equivalent O(20)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifth O site, O(5) is bonded to one Mg(12), one Mg(20), one Mg(3), one Mg(7), one Mg(8), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra, corners with two equivalent O(19)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and  an edgeedge with one O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixth O site, O(6) is bonded to one Mg(11), one Mg(19), one Mg(4), one Mg(7), one Mg(8), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(14)Mg6 octahedra, corners with two equivalent O(21)Mg6 octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, edges with two equivalent O(11)Mg5Fe octahedra, and edges with two equivalent O(22)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the seventh O site, O(7) is bonded to one Mg(1), one Mg(10), one Mg(18), one Mg(5), one Mg(6), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra, corners with two equivalent O(17)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra, and  an edgeedge with one O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighth O site, O(8) is bonded to one Mg(1), one Mg(11), one Mg(13), one Mg(20), one Mg(3), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(1)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra, corners with two equivalent O(14)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, and  an edgeedge with one O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the ninth O site, O(9) is bonded to one Mg(12), one Mg(14), one Mg(17), two equivalent Mg(2), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(10)Mg5Fe octahedra,  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, edges with two equivalent O(18)Mg5Fe octahedra, and edges with two equivalent O(4)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the tenth O site, O(10) is bonded to one Mg(1), one Mg(15), one Mg(18), one Mg(3), one Mg(9), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(21)Mg6 octahedra,  a cornercorner with one O(3)Mg6 octahedra, corners with two equivalent O(12)Mg6 octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra, and  an edgeedge with one O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the eleventh O site, O(11) is bonded to one Mg(10), one Mg(16), one Mg(19), two equivalent Mg(4), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(8)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, edges with two equivalent O(16)Mg5Fe octahedra, and edges with two equivalent O(6)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twelfth O site, O(12) is bonded to one Mg(1), one Mg(13), one Mg(14), one Mg(17), one Mg(5), and one Mg(9) atom to form OMg6 octahedra that share  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra, corners with two equivalent O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and edges with two equivalent O(20)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the thirteenth O site, O(13) is bonded to one Mg(10), one Mg(13), one Mg(14), one Mg(2), one Mg(20), and one Mg(6) atom to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(1)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and edges with two equivalent O(17)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fourteenth O site, O(14) is bonded to one Mg(11), one Mg(15), one Mg(16), one Mg(19), one Mg(3), and one Mg(7) atom to form OMg6 octahedra that share  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(2)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra, corners with two equivalent O(8)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, and edges with two equivalent O(22)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fifteenth O site, O(15) is bonded to one Mg(12), one Mg(15), one Mg(16), one Mg(18), one Mg(4), and one Mg(8) atom to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(21)Mg6 octahedra,  a cornercorner with one O(3)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, and edges with two equivalent O(19)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the sixteenth O site, O(16) is bonded to one Mg(13), one Mg(15), one Mg(19), one Mg(4), one Mg(5), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(10)Mg5Fe octahedra,  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(22)Mg6 octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, and edges with two equivalent O(11)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the seventeenth O site, O(17) is bonded to one Mg(1), one Mg(20), one Mg(6), two equivalent Mg(14), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra,  a cornercorner with one O(21)Mg6 octahedra, corners with two equivalent O(7)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(17)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra, edges with two equivalent O(13)Mg6 octahedra, and edges with two equivalent O(23)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighteenth O site, O(18) is bonded to one Mg(13), one Mg(15), one Mg(17), one Mg(2), one Mg(7), and one Fe(1) atom to form OMg5Fe octahedra that share  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(4)Mg5Fe octahedra,  a cornercorner with one O(6)Mg5Fe octahedra,  a cornercorner with one O(8)Mg5Fe octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(20)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(4)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, and edges with two equivalent O(9)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the nineteenth O site, O(19) is bonded to one Mg(18), one Mg(3), one Mg(8), two equivalent Mg(16), and one Fe(2) atom to form OMg5Fe octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(14)Mg6 octahedra,  a cornercorner with one O(23)Mg6 octahedra, corners with two equivalent O(5)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(19)Mg5Fe octahedra,  an edgeedge with one O(6)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, edges with two equivalent O(15)Mg6 octahedra, and edges with two equivalent O(21)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twentieth O site, O(20) is bonded to one Mg(12), one Mg(15), one Mg(5), one Mg(9), and two equivalent Mg(17) atoms to form OMg6 octahedra that share  a cornercorner with one O(18)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(9)Mg5Fe octahedra,  a cornercorner with one O(1)Mg6 octahedra,  a cornercorner with one O(14)Mg6 octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra, edges with two equivalent O(4)Mg5Fe octahedra, and edges with two equivalent O(12)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twenty-first O site, O(21) is bonded to one Mg(10), one Mg(11), one Mg(16), one Mg(18), one Mg(20), and one Mg(8) atom to form OMg6 octahedra that share  a cornercorner with one O(10)Mg5Fe octahedra,  a cornercorner with one O(17)Mg5Fe octahedra,  a cornercorner with one O(15)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra, corners with two equivalent O(6)Mg5Fe octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(14)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra,  an edgeedge with one O(23)Mg6 octahedra,  an edgeedge with one O(3)Mg6 octahedra, and edges with two equivalent O(19)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the twenty-second O site, O(22) is bonded to one Mg(10), one Mg(11), one Mg(13), one Mg(7), and two equivalent Mg(19) atoms to form OMg6 octahedra that share  a cornercorner with one O(11)Mg5Fe octahedra,  a cornercorner with one O(16)Mg5Fe octahedra,  a cornercorner with one O(5)Mg5Fe octahedra,  a cornercorner with one O(7)Mg5Fe octahedra,  a cornercorner with one O(12)Mg6 octahedra,  a cornercorner with one O(3)Mg6 octahedra,  an edgeedge with one O(11)Mg5Fe octahedra,  an edgeedge with one O(16)Mg5Fe octahedra,  an edgeedge with one O(18)Mg5Fe octahedra,  an edgeedge with one O(8)Mg5Fe octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(2)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra,  an edgeedge with one O(22)Mg6 octahedra, edges with two equivalent O(6)Mg5Fe octahedra, and edges with two equivalent O(14)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the twenty-third O site, O(23) is bonded to one Mg(12), one Mg(14), one Mg(18), one Mg(20), one Mg(6), and one Mg(9) atom to form OMg6 octahedra that share  a cornercorner with one O(19)Mg5Fe octahedra,  a cornercorner with one O(8)Mg5Fe octahedra,  a cornercorner with one O(13)Mg6 octahedra,  a cornercorner with one O(2)Mg6 octahedra, corners with two equivalent O(4)Mg5Fe octahedra,  an edgeedge with one O(10)Mg5Fe octahedra,  an edgeedge with one O(5)Mg5Fe octahedra,  an edgeedge with one O(7)Mg5Fe octahedra,  an edgeedge with one O(9)Mg5Fe octahedra,  an edgeedge with one O(1)Mg6 octahedra,  an edgeedge with one O(12)Mg6 octahedra,  an edgeedge with one O(13)Mg6 octahedra,  an edgeedge with one O(15)Mg6 octahedra,  an edgeedge with one O(20)Mg6 octahedra,  an edgeedge with one O(21)Mg6 octahedra, and edges with two equivalent O(17)Mg5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-2°. is represented by the CIF card [CIF]
data_Mg10FeO11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.231
_cell_length_b   6.750
_cell_length_c   6.760
_cell_angle_alpha   107.441
_cell_angle_beta   97.541
_cell_angle_gamma   104.934
_symmetry_Int_Tables_number   1
_cell_volume   214.350
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Fe  Fe0  1  0.545  0.182  0.909  1.0
  Mg  Mg1  1  0.091  0.364  0.818  1.0
  Mg  Mg2  1  1.000  0.999  0.000  1.0
  Mg  Mg3  1  0.637  0.544  0.727  1.0
  Mg  Mg4  1  0.454  0.820  0.092  1.0
  Mg  Mg5  1  0.181  0.726  0.636  1.0
  Mg  Mg6  1  0.910  0.638  0.182  1.0
  Mg  Mg7  1  0.272  0.091  0.456  1.0
  Mg  Mg8  1  0.819  0.272  0.362  1.0
  Mg  Mg9  1  0.725  0.908  0.544  1.0
  Mg  Mg10  1  0.366  0.455  0.274  1.0
  O  O11  1  0.045  0.682  0.909  1.0
  O  O12  1  0.500  0.505  0.002  1.0
  O  O13  1  0.591  0.859  0.816  1.0
  O  O14  1  0.130  0.043  0.725  1.0
  O  O15  1  0.961  0.320  0.093  1.0
  O  O16  1  0.228  0.409  0.546  1.0
  O  O17  1  0.863  0.955  0.272  1.0
  O  O18  1  0.685  0.228  0.631  1.0
  O  O19  1  0.405  0.135  0.187  1.0
  O  O20  1  0.318  0.773  0.365  1.0
  O  O21  1  0.773  0.590  0.453  1.0
[/CIF]
.