The structure described by Y4Fe13Si2(SbO14)2 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(12), one O(2), one O(28), one O(5), and one O(8) atom. In the second Y site, Y(2) is bonded to one O(1), one O(19), one O(2), one O(24), and one O(28) atom to form distorted YO5 trigonal bipyramids that share  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, corners with two equivalent Y(3)O5 trigonal bipyramids, corners with two equivalent Fe(4)O5 trigonal bipyramids, and  an edgeedge with one Fe(11)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 59-64°. In the third Y site, Y(3) is bonded to one O(2), one O(24), one O(27), one O(5), and one O(7) atom to form distorted YO5 trigonal bipyramids that share  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(4)O5 trigonal bipyramid, corners with two equivalent Y(2)O5 trigonal bipyramids, corners with two equivalent Fe(3)O5 trigonal bipyramids, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 59-63°. In the fourth Y site, Y(4) is bonded in a 5-coordinate geometry to one O(13), one O(24), one O(28), one O(5), and one O(6) atom. There are thirteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(21), one O(25), one O(27), one O(5), and one O(6) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra,  an edgeedge with one Y(3)O5 trigonal bipyramid, and  an edgeedge with one Fe(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-71°. In the second Fe site, Fe(2) is bonded to one O(1), one O(11), one O(14), and one O(3) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(10)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Fe(11)O5 trigonal bipyramid, and corners with two equivalent Fe(4)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 52-74°. In the third Fe site, Fe(3) is bonded to one O(22), one O(23), one O(24), one O(27), and one O(6) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(10)O4 tetrahedra,  a cornercorner with one Y(2)O5 trigonal bipyramid, corners with two equivalent Y(3)O5 trigonal bipyramids, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-71°. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(11), one O(12), one O(2), and one O(20) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra,  a cornercorner with one Y(3)O5 trigonal bipyramid, corners with two equivalent Y(2)O5 trigonal bipyramids, and  an edgeedge with one Fe(11)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-71°. In the fifth Fe site, Fe(5) is bonded to one O(16), one O(17), one O(25), and one O(6) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(7)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, and corners with two equivalent Fe(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 52-75°. In the sixth Fe site, Fe(6) is bonded to one O(13), one O(19), one O(20), one O(26), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(11)O5 trigonal bipyramid,  a cornercorner with one Fe(4)O5 trigonal bipyramid,  an edgeedge with one Fe(9)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Fe(13)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(12), one O(15), and one O(16) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(5)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Fe(4)O5 trigonal bipyramid, and corners with two equivalent Fe(11)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 51-76°. In the eighth Fe site, Fe(8) is bonded to one O(10), one O(14), one O(17), one O(18), one O(4), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Fe(12)O6 octahedra, and edges with two equivalent Fe(9)O6 octahedra. In the ninth Fe site, Fe(9) is bonded to one O(10), one O(14), one O(20), one O(26), one O(4), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Fe(11)O5 trigonal bipyramid,  a cornercorner with one Fe(4)O5 trigonal bipyramid,  an edgeedge with one Fe(12)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, edges with two equivalent Fe(8)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the tenth Fe site, Fe(10) is bonded to one O(18), one O(22), one O(27), and one O(3) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and corners with two equivalent Fe(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 52-74°. In the eleventh Fe site, Fe(11) is bonded to one O(1), one O(12), one O(15), one O(26), and one O(28) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Fe(7)O4 tetrahedra,  an edgeedge with one Y(2)O5 trigonal bipyramid, and  an edgeedge with one Fe(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 53-70°. In the twelfth Fe site, Fe(12) is bonded to one O(17), one O(18), one O(21), one O(23), one O(4), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(13)O6 octahedra,  an edgeedge with one Fe(9)O6 octahedra, edges with two equivalent Fe(8)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. In the thirteenth Fe site, Fe(13) is bonded to one O(13), one O(19), one O(21), one O(23), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(12)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Fe(6)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(22), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with two equivalent Fe(10)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, and  a cornercorner with one Fe(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 62-64°. In the second Si site, Si(2) is bonded to one O(15), one O(16), one O(25), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with two equivalent Fe(5)O4 tetrahedra, corners with two equivalent Fe(7)O4 tetrahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  a cornercorner with one Fe(11)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 61-65°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(10), one O(14), one O(19), one O(20), one O(26), and one O(8) atom to form SbO6 octahedra that share  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Fe(11)O5 trigonal bipyramid,  a cornercorner with one Fe(4)O5 trigonal bipyramid,  an edgeedge with one Fe(13)O6 octahedra,  an edgeedge with one Fe(8)O6 octahedra, edges with two equivalent Fe(6)O6 octahedra, and edges with two equivalent Fe(9)O6 octahedra. In the second Sb site, Sb(2) is bonded to one O(13), one O(17), one O(18), one O(21), one O(23), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(6)O6 octahedra,  an edgeedge with one Fe(8)O6 octahedra, edges with two equivalent Fe(12)O6 octahedra, and edges with two equivalent Fe(13)O6 octahedra. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded to one Y(2), one Fe(11), one Fe(2), and one Fe(4) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra, corners with two equivalent O(2)Y3Fe tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  an edgeedge with one O(28)Y3Fe tetrahedra, and  an edgeedge with one O(12)YFe3 tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Y(3), and one Fe(4) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra, corners with two equivalent O(24)Y3Fe tetrahedra, corners with two equivalent O(1)YFe3 tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  an edgeedge with one O(28)Y3Fe tetrahedra,  an edgeedge with one O(5)Y3Fe tetrahedra, and  an edgeedge with one O(12)YFe3 tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(10), one Fe(2), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Fe(12), one Fe(8), one Fe(9), and one Si(1) atom to form distorted OFe3Si tetrahedra that share  a cornercorner with one O(9)Fe3Si tetrahedra, corners with two equivalent O(14)Fe3Sb tetrahedra, corners with two equivalent O(18)Fe3Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(10)Fe3Sb tetrahedra,  an edgeedge with one O(17)Fe3Sb tetrahedra, and  an edgeedge with one O(9)Fe3Si tetrahedra. In the fifth O site, O(5) is bonded to one Y(1), one Y(3), one Y(4), and one Fe(1) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(28)Y3Fe tetrahedra, corners with two equivalent O(6)YFe3 tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  an edgeedge with one O(2)Y3Fe tetrahedra,  an edgeedge with one O(24)Y3Fe tetrahedra, and  an edgeedge with one O(27)YFe3 tetrahedra. In the sixth O site, O(6) is bonded to one Y(4), one Fe(1), one Fe(3), and one Fe(5) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra, corners with two equivalent O(5)Y3Fe tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(24)Y3Fe tetrahedra, and  an edgeedge with one O(27)YFe3 tetrahedra. In the seventh O site, O(7) is bonded to one Y(3), one Fe(13), one Fe(6), and one Sb(2) atom to form distorted OYFe2Sb tetrahedra that share  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra, corners with two equivalent O(19)YFe2Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid, corners with two equivalent O(23)Fe3Sb trigonal pyramids,  an edgeedge with one O(13)YFe2Sb tetrahedra,  an edgeedge with one O(8)YFe2Sb tetrahedra, and  an edgeedge with one O(21)Fe3Sb trigonal pyramid. In the eighth O site, O(8) is bonded to one Y(1), one Fe(13), one Fe(6), and one Sb(1) atom to form OYFe2Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(13)YFe2Sb tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(19)YFe2Sb tetrahedra,  an edgeedge with one O(7)YFe2Sb tetrahedra, and  an edgeedge with one O(20)Fe3Sb trigonal pyramid. In the ninth O site, O(9) is bonded to one Fe(12), one Fe(8), one Fe(9), and one Si(2) atom to form distorted OFe3Si tetrahedra that share  a cornercorner with one O(4)Fe3Si tetrahedra, corners with two equivalent O(10)Fe3Sb tetrahedra, corners with two equivalent O(17)Fe3Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(14)Fe3Sb tetrahedra,  an edgeedge with one O(18)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the tenth O site, O(10) is bonded to one Fe(7), one Fe(8), one Fe(9), and one Sb(1) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(9)Fe3Si tetrahedra,  an edgeedge with one O(14)Fe3Sb tetrahedra,  an edgeedge with one O(4)Fe3Si tetrahedra, and  an edgeedge with one O(20)Fe3Sb trigonal pyramid. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Fe(2), one Fe(4), and one Si(1) atom. In the twelfth O site, O(12) is bonded to one Y(1), one Fe(11), one Fe(4), and one Fe(7) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra, corners with two equivalent O(28)Y3Fe tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  an edgeedge with one O(2)Y3Fe tetrahedra, and  an edgeedge with one O(1)YFe3 tetrahedra. In the thirteenth O site, O(13) is bonded to one Y(4), one Fe(13), one Fe(6), and one Sb(2) atom to form OYFe2Sb tetrahedra that share  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(8)YFe2Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid, corners with two equivalent O(21)Fe3Sb trigonal pyramids,  an edgeedge with one O(19)YFe2Sb tetrahedra,  an edgeedge with one O(7)YFe2Sb tetrahedra, and  an edgeedge with one O(23)Fe3Sb trigonal pyramid. In the fourteenth O site, O(14) is bonded to one Fe(2), one Fe(8), one Fe(9), and one Sb(1) atom to form OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra, corners with two equivalent O(20)Fe3Sb trigonal pyramids,  an edgeedge with one O(10)Fe3Sb tetrahedra, and  an edgeedge with one O(9)Fe3Si tetrahedra. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Fe(11), one Fe(7), and one Si(2) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Fe(5), one Fe(7), and one Si(2) atom. In the seventeenth O site, O(17) is bonded to one Fe(12), one Fe(5), one Fe(8), and one Sb(2) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(9)Fe3Si tetrahedra, corners with two equivalent O(21)Fe3Sb trigonal pyramids,  an edgeedge with one O(18)Fe3Sb tetrahedra,  an edgeedge with one O(4)Fe3Si tetrahedra, and  an edgeedge with one O(23)Fe3Sb trigonal pyramid. In the eighteenth O site, O(18) is bonded to one Fe(10), one Fe(12), one Fe(8), and one Sb(2) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra, corners with two equivalent O(23)Fe3Sb trigonal pyramids,  an edgeedge with one O(17)Fe3Sb tetrahedra,  an edgeedge with one O(9)Fe3Si tetrahedra, and  an edgeedge with one O(21)Fe3Sb trigonal pyramid. In the nineteenth O site, O(19) is bonded to one Y(2), one Fe(13), one Fe(6), and one Sb(1) atom to form distorted OYFe2Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra, corners with two equivalent O(7)YFe2Sb tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid, corners with two equivalent O(20)Fe3Sb trigonal pyramids,  an edgeedge with one O(13)YFe2Sb tetrahedra, and  an edgeedge with one O(8)YFe2Sb tetrahedra. In the twentieth O site, O(20) is bonded to one Fe(4), one Fe(6), one Fe(9), and one Sb(1) atom to form distorted OFe3Sb trigonal pyramids that share  a cornercorner with one O(4)Fe3Si tetrahedra,  a cornercorner with one O(9)Fe3Si tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(14)Fe3Sb tetrahedra, corners with two equivalent O(19)YFe2Sb tetrahedra,  an edgeedge with one O(10)Fe3Sb tetrahedra, and  an edgeedge with one O(8)YFe2Sb tetrahedra. In the twenty-first O site, O(21) is bonded to one Fe(1), one Fe(12), one Fe(13), and one Sb(2) atom to form distorted OFe3Sb trigonal pyramids that share  a cornercorner with one O(4)Fe3Si tetrahedra,  a cornercorner with one O(9)Fe3Si tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(17)Fe3Sb tetrahedra, corners with two equivalent O(13)YFe2Sb tetrahedra,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(18)Fe3Sb tetrahedra,  an edgeedge with one O(7)YFe2Sb tetrahedra, and  an edgeedge with one O(23)Fe3Sb trigonal pyramid. In the twenty-second O site, O(22) is bonded in a trigonal planar geometry to one Fe(10), one Fe(3), and one Si(1) atom. In the twenty-third O site, O(23) is bonded to one Fe(12), one Fe(13), one Fe(3), and one Sb(2) atom to form distorted OFe3Sb trigonal pyramids that share  a cornercorner with one O(4)Fe3Si tetrahedra,  a cornercorner with one O(9)Fe3Si tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(18)Fe3Sb tetrahedra, corners with two equivalent O(7)YFe2Sb tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  an edgeedge with one O(17)Fe3Sb tetrahedra,  an edgeedge with one O(13)YFe2Sb tetrahedra, and  an edgeedge with one O(21)Fe3Sb trigonal pyramid. In the twenty-fourth O site, O(24) is bonded to one Y(2), one Y(3), one Y(4), and one Fe(3) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra, corners with two equivalent O(2)Y3Fe tetrahedra, corners with two equivalent O(27)YFe3 tetrahedra,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(28)Y3Fe tetrahedra,  an edgeedge with one O(5)Y3Fe tetrahedra, and  an edgeedge with one O(6)YFe3 tetrahedra. In the twenty-fifth O site, O(25) is bonded in a trigonal planar geometry to one Fe(1), one Fe(5), and one Si(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted rectangular see-saw-like geometry to one Fe(11), one Fe(6), one Fe(9), and one Sb(1) atom. In the twenty-seventh O site, O(27) is bonded to one Y(3), one Fe(1), one Fe(10), and one Fe(3) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra, corners with two equivalent O(24)Y3Fe tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(5)Y3Fe tetrahedra, and  an edgeedge with one O(6)YFe3 tetrahedra. In the twenty-eighth O site, O(28) is bonded to one Y(1), one Y(2), one Y(4), and one Fe(11) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(5)Y3Fe tetrahedra, corners with two equivalent O(12)YFe3 tetrahedra,  an edgeedge with one O(2)Y3Fe tetrahedra,  an edgeedge with one O(24)Y3Fe tetrahedra, and  an edgeedge with one O(1)YFe3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y4Fe13Si2(SbO14)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   9.546
_cell_length_c   12.334
_cell_angle_alpha   87.586
_cell_angle_beta   76.677
_cell_angle_gamma   79.802
_symmetry_Int_Tables_number   1
_cell_volume   643.050
_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
  Y  Y0  1  0.073  0.656  0.411  1.0
  Y  Y1  1  0.515  0.346  0.412  1.0
  Y  Y2  1  0.926  0.347  0.588  1.0
  Y  Y3  1  0.485  0.657  0.588  1.0
  Fe  Fe4  1  0.922  0.647  0.737  1.0
  Fe  Fe5  1  0.664  0.316  0.126  1.0
  Fe  Fe6  1  0.343  0.354  0.737  1.0
  Fe  Fe7  1  0.079  0.353  0.263  1.0
  Fe  Fe8  1  0.336  0.683  0.874  1.0
  Fe  Fe9  1  0.287  0.001  0.425  1.0
  Fe  Fe10  1  0.209  0.682  0.126  1.0
  Fe  Fe11  1  1.000  0.000  0.000  1.0
  Fe  Fe12  1  0.427  0.999  0.149  1.0
  Fe  Fe13  1  0.791  0.317  0.873  1.0
  Fe  Fe14  1  0.658  0.646  0.262  1.0
  Fe  Fe15  1  0.576  0.999  0.851  1.0
  Fe  Fe16  1  0.712  0.001  0.577  1.0
  Si  Si17  1  0.244  0.280  1.000  1.0
  Si  Si18  1  0.757  0.718  1.000  1.0
  Sb  Sb19  1  0.855  1.000  0.286  1.0
  Sb  Sb20  1  0.143  0.000  0.714  1.0
  O  O21  1  0.714  0.409  0.256  1.0
  O  O22  1  0.127  0.391  0.419  1.0
  O  O23  1  0.955  0.337  1.000  1.0
  O  O24  1  0.295  0.104  0.000  1.0
  O  O25  1  0.873  0.610  0.580  1.0
  O  O26  1  0.287  0.591  0.743  1.0
  O  O27  1  0.010  0.112  0.587  1.0
  O  O28  1  0.977  0.893  0.420  1.0
  O  O29  1  0.707  0.894  1.000  1.0
  O  O30  1  0.121  0.896  0.161  1.0
  O  O31  1  0.314  0.337  0.111  1.0
  O  O32  1  0.028  0.589  0.257  1.0
  O  O33  1  0.397  0.893  0.581  1.0
  O  O34  1  0.725  0.102  0.157  1.0
  O  O35  1  0.575  0.661  0.110  1.0
  O  O36  1  0.045  0.661  1.000  1.0
  O  O37  1  0.281  0.897  0.841  1.0
  O  O38  1  0.882  0.102  0.842  1.0
  O  O39  1  0.595  0.110  0.413  1.0
  O  O40  1  0.114  0.119  0.294  1.0
  O  O41  1  0.887  0.879  0.708  1.0
  O  O42  1  0.425  0.338  0.890  1.0
  O  O43  1  0.411  0.119  0.707  1.0
  O  O44  1  0.546  0.391  0.580  1.0
  O  O45  1  0.687  0.661  0.889  1.0
  O  O46  1  0.596  0.878  0.291  1.0
  O  O47  1  0.973  0.411  0.743  1.0
  O  O48  1  0.453  0.610  0.419  1.0
[/CIF]
.
The structure described by Y4Fe13Si2(SbO14)2 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(12), one O(2), one O(28), one O(5), and one O(8) atom. In the second Y site, Y(2) is bonded to one O(1), one O(19), one O(2), one O(24), and one O(28) atom to form distorted YO5 trigonal bipyramids that share  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, corners with two equivalent Y(3)O5 trigonal bipyramids, corners with two equivalent Fe(4)O5 trigonal bipyramids, and  an edgeedge with one Fe(11)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 59-64°. In the third Y site, Y(3) is bonded to one O(2), one O(24), one O(27), one O(5), and one O(7) atom to form distorted YO5 trigonal bipyramids that share  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(4)O5 trigonal bipyramid, corners with two equivalent Y(2)O5 trigonal bipyramids, corners with two equivalent Fe(3)O5 trigonal bipyramids, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 59-63°. In the fourth Y site, Y(4) is bonded in a 5-coordinate geometry to one O(13), one O(24), one O(28), one O(5), and one O(6) atom. There are thirteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(21), one O(25), one O(27), one O(5), and one O(6) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra,  an edgeedge with one Y(3)O5 trigonal bipyramid, and  an edgeedge with one Fe(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-71°. In the second Fe site, Fe(2) is bonded to one O(1), one O(11), one O(14), and one O(3) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(10)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Fe(11)O5 trigonal bipyramid, and corners with two equivalent Fe(4)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 52-74°. In the third Fe site, Fe(3) is bonded to one O(22), one O(23), one O(24), one O(27), and one O(6) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(13)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(10)O4 tetrahedra,  a cornercorner with one Y(2)O5 trigonal bipyramid, corners with two equivalent Y(3)O5 trigonal bipyramids, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-71°. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(11), one O(12), one O(2), and one O(20) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra,  a cornercorner with one Y(3)O5 trigonal bipyramid, corners with two equivalent Y(2)O5 trigonal bipyramids, and  an edgeedge with one Fe(11)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-71°. In the fifth Fe site, Fe(5) is bonded to one O(16), one O(17), one O(25), and one O(6) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(7)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, and corners with two equivalent Fe(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 52-75°. In the sixth Fe site, Fe(6) is bonded to one O(13), one O(19), one O(20), one O(26), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(11)O5 trigonal bipyramid,  a cornercorner with one Fe(4)O5 trigonal bipyramid,  an edgeedge with one Fe(9)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Fe(13)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(12), one O(15), and one O(16) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(5)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Fe(4)O5 trigonal bipyramid, and corners with two equivalent Fe(11)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 51-76°. In the eighth Fe site, Fe(8) is bonded to one O(10), one O(14), one O(17), one O(18), one O(4), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Fe(12)O6 octahedra, and edges with two equivalent Fe(9)O6 octahedra. In the ninth Fe site, Fe(9) is bonded to one O(10), one O(14), one O(20), one O(26), one O(4), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Fe(11)O5 trigonal bipyramid,  a cornercorner with one Fe(4)O5 trigonal bipyramid,  an edgeedge with one Fe(12)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, edges with two equivalent Fe(8)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the tenth Fe site, Fe(10) is bonded to one O(18), one O(22), one O(27), and one O(3) atom to form FeO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and corners with two equivalent Fe(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 52-74°. In the eleventh Fe site, Fe(11) is bonded to one O(1), one O(12), one O(15), one O(26), and one O(28) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Fe(7)O4 tetrahedra,  an edgeedge with one Y(2)O5 trigonal bipyramid, and  an edgeedge with one Fe(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 53-70°. In the twelfth Fe site, Fe(12) is bonded to one O(17), one O(18), one O(21), one O(23), one O(4), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(13)O6 octahedra,  an edgeedge with one Fe(9)O6 octahedra, edges with two equivalent Fe(8)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. In the thirteenth Fe site, Fe(13) is bonded to one O(13), one O(19), one O(21), one O(23), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(12)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Fe(6)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(22), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with two equivalent Fe(10)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, and  a cornercorner with one Fe(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 62-64°. In the second Si site, Si(2) is bonded to one O(15), one O(16), one O(25), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(12)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with two equivalent Fe(5)O4 tetrahedra, corners with two equivalent Fe(7)O4 tetrahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  a cornercorner with one Fe(11)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 61-65°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(10), one O(14), one O(19), one O(20), one O(26), and one O(8) atom to form SbO6 octahedra that share  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra,  a cornercorner with one Y(2)O5 trigonal bipyramid,  a cornercorner with one Fe(11)O5 trigonal bipyramid,  a cornercorner with one Fe(4)O5 trigonal bipyramid,  an edgeedge with one Fe(13)O6 octahedra,  an edgeedge with one Fe(8)O6 octahedra, edges with two equivalent Fe(6)O6 octahedra, and edges with two equivalent Fe(9)O6 octahedra. In the second Sb site, Sb(2) is bonded to one O(13), one O(17), one O(18), one O(21), one O(23), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Fe(10)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra,  a cornercorner with one Y(3)O5 trigonal bipyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(6)O6 octahedra,  an edgeedge with one Fe(8)O6 octahedra, edges with two equivalent Fe(12)O6 octahedra, and edges with two equivalent Fe(13)O6 octahedra. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded to one Y(2), one Fe(11), one Fe(2), and one Fe(4) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra, corners with two equivalent O(2)Y3Fe tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  an edgeedge with one O(28)Y3Fe tetrahedra, and  an edgeedge with one O(12)YFe3 tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Y(3), and one Fe(4) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra, corners with two equivalent O(24)Y3Fe tetrahedra, corners with two equivalent O(1)YFe3 tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  an edgeedge with one O(28)Y3Fe tetrahedra,  an edgeedge with one O(5)Y3Fe tetrahedra, and  an edgeedge with one O(12)YFe3 tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(10), one Fe(2), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Fe(12), one Fe(8), one Fe(9), and one Si(1) atom to form distorted OFe3Si tetrahedra that share  a cornercorner with one O(9)Fe3Si tetrahedra, corners with two equivalent O(14)Fe3Sb tetrahedra, corners with two equivalent O(18)Fe3Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(10)Fe3Sb tetrahedra,  an edgeedge with one O(17)Fe3Sb tetrahedra, and  an edgeedge with one O(9)Fe3Si tetrahedra. In the fifth O site, O(5) is bonded to one Y(1), one Y(3), one Y(4), and one Fe(1) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(28)Y3Fe tetrahedra, corners with two equivalent O(6)YFe3 tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  an edgeedge with one O(2)Y3Fe tetrahedra,  an edgeedge with one O(24)Y3Fe tetrahedra, and  an edgeedge with one O(27)YFe3 tetrahedra. In the sixth O site, O(6) is bonded to one Y(4), one Fe(1), one Fe(3), and one Fe(5) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra, corners with two equivalent O(5)Y3Fe tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(24)Y3Fe tetrahedra, and  an edgeedge with one O(27)YFe3 tetrahedra. In the seventh O site, O(7) is bonded to one Y(3), one Fe(13), one Fe(6), and one Sb(2) atom to form distorted OYFe2Sb tetrahedra that share  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra, corners with two equivalent O(19)YFe2Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid, corners with two equivalent O(23)Fe3Sb trigonal pyramids,  an edgeedge with one O(13)YFe2Sb tetrahedra,  an edgeedge with one O(8)YFe2Sb tetrahedra, and  an edgeedge with one O(21)Fe3Sb trigonal pyramid. In the eighth O site, O(8) is bonded to one Y(1), one Fe(13), one Fe(6), and one Sb(1) atom to form OYFe2Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(13)YFe2Sb tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(19)YFe2Sb tetrahedra,  an edgeedge with one O(7)YFe2Sb tetrahedra, and  an edgeedge with one O(20)Fe3Sb trigonal pyramid. In the ninth O site, O(9) is bonded to one Fe(12), one Fe(8), one Fe(9), and one Si(2) atom to form distorted OFe3Si tetrahedra that share  a cornercorner with one O(4)Fe3Si tetrahedra, corners with two equivalent O(10)Fe3Sb tetrahedra, corners with two equivalent O(17)Fe3Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(14)Fe3Sb tetrahedra,  an edgeedge with one O(18)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the tenth O site, O(10) is bonded to one Fe(7), one Fe(8), one Fe(9), and one Sb(1) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(9)Fe3Si tetrahedra,  an edgeedge with one O(14)Fe3Sb tetrahedra,  an edgeedge with one O(4)Fe3Si tetrahedra, and  an edgeedge with one O(20)Fe3Sb trigonal pyramid. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Fe(2), one Fe(4), and one Si(1) atom. In the twelfth O site, O(12) is bonded to one Y(1), one Fe(11), one Fe(4), and one Fe(7) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra, corners with two equivalent O(28)Y3Fe tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid,  an edgeedge with one O(2)Y3Fe tetrahedra, and  an edgeedge with one O(1)YFe3 tetrahedra. In the thirteenth O site, O(13) is bonded to one Y(4), one Fe(13), one Fe(6), and one Sb(2) atom to form OYFe2Sb tetrahedra that share  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(8)YFe2Sb tetrahedra,  a cornercorner with one O(20)Fe3Sb trigonal pyramid, corners with two equivalent O(21)Fe3Sb trigonal pyramids,  an edgeedge with one O(19)YFe2Sb tetrahedra,  an edgeedge with one O(7)YFe2Sb tetrahedra, and  an edgeedge with one O(23)Fe3Sb trigonal pyramid. In the fourteenth O site, O(14) is bonded to one Fe(2), one Fe(8), one Fe(9), and one Sb(1) atom to form OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra, corners with two equivalent O(20)Fe3Sb trigonal pyramids,  an edgeedge with one O(10)Fe3Sb tetrahedra, and  an edgeedge with one O(9)Fe3Si tetrahedra. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Fe(11), one Fe(7), and one Si(2) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Fe(5), one Fe(7), and one Si(2) atom. In the seventeenth O site, O(17) is bonded to one Fe(12), one Fe(5), one Fe(8), and one Sb(2) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(9)Fe3Si tetrahedra, corners with two equivalent O(21)Fe3Sb trigonal pyramids,  an edgeedge with one O(18)Fe3Sb tetrahedra,  an edgeedge with one O(4)Fe3Si tetrahedra, and  an edgeedge with one O(23)Fe3Sb trigonal pyramid. In the eighteenth O site, O(18) is bonded to one Fe(10), one Fe(12), one Fe(8), and one Sb(2) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(17)Fe3Sb tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra, corners with two equivalent O(23)Fe3Sb trigonal pyramids,  an edgeedge with one O(17)Fe3Sb tetrahedra,  an edgeedge with one O(9)Fe3Si tetrahedra, and  an edgeedge with one O(21)Fe3Sb trigonal pyramid. In the nineteenth O site, O(19) is bonded to one Y(2), one Fe(13), one Fe(6), and one Sb(1) atom to form distorted OYFe2Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra,  a cornercorner with one O(14)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(28)Y3Fe tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra, corners with two equivalent O(7)YFe2Sb tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid, corners with two equivalent O(20)Fe3Sb trigonal pyramids,  an edgeedge with one O(13)YFe2Sb tetrahedra, and  an edgeedge with one O(8)YFe2Sb tetrahedra. In the twentieth O site, O(20) is bonded to one Fe(4), one Fe(6), one Fe(9), and one Sb(1) atom to form distorted OFe3Sb trigonal pyramids that share  a cornercorner with one O(4)Fe3Si tetrahedra,  a cornercorner with one O(9)Fe3Si tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra,  a cornercorner with one O(12)YFe3 tetrahedra, corners with two equivalent O(14)Fe3Sb tetrahedra, corners with two equivalent O(19)YFe2Sb tetrahedra,  an edgeedge with one O(10)Fe3Sb tetrahedra, and  an edgeedge with one O(8)YFe2Sb tetrahedra. In the twenty-first O site, O(21) is bonded to one Fe(1), one Fe(12), one Fe(13), and one Sb(2) atom to form distorted OFe3Sb trigonal pyramids that share  a cornercorner with one O(4)Fe3Si tetrahedra,  a cornercorner with one O(9)Fe3Si tetrahedra,  a cornercorner with one O(5)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(17)Fe3Sb tetrahedra, corners with two equivalent O(13)YFe2Sb tetrahedra,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(18)Fe3Sb tetrahedra,  an edgeedge with one O(7)YFe2Sb tetrahedra, and  an edgeedge with one O(23)Fe3Sb trigonal pyramid. In the twenty-second O site, O(22) is bonded in a trigonal planar geometry to one Fe(10), one Fe(3), and one Si(1) atom. In the twenty-third O site, O(23) is bonded to one Fe(12), one Fe(13), one Fe(3), and one Sb(2) atom to form distorted OFe3Sb trigonal pyramids that share  a cornercorner with one O(4)Fe3Si tetrahedra,  a cornercorner with one O(9)Fe3Si tetrahedra,  a cornercorner with one O(24)Y3Fe tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(27)YFe3 tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(18)Fe3Sb tetrahedra, corners with two equivalent O(7)YFe2Sb tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  an edgeedge with one O(17)Fe3Sb tetrahedra,  an edgeedge with one O(13)YFe2Sb tetrahedra, and  an edgeedge with one O(21)Fe3Sb trigonal pyramid. In the twenty-fourth O site, O(24) is bonded to one Y(2), one Y(3), one Y(4), and one Fe(3) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra,  a cornercorner with one O(1)YFe3 tetrahedra, corners with two equivalent O(2)Y3Fe tetrahedra, corners with two equivalent O(27)YFe3 tetrahedra,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(28)Y3Fe tetrahedra,  an edgeedge with one O(5)Y3Fe tetrahedra, and  an edgeedge with one O(6)YFe3 tetrahedra. In the twenty-fifth O site, O(25) is bonded in a trigonal planar geometry to one Fe(1), one Fe(5), and one Si(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted rectangular see-saw-like geometry to one Fe(11), one Fe(6), one Fe(9), and one Sb(1) atom. In the twenty-seventh O site, O(27) is bonded to one Y(3), one Fe(1), one Fe(10), and one Fe(3) atom to form OYFe3 tetrahedra that share  a cornercorner with one O(18)Fe3Sb tetrahedra,  a cornercorner with one O(2)Y3Fe tetrahedra,  a cornercorner with one O(7)YFe2Sb tetrahedra, corners with two equivalent O(24)Y3Fe tetrahedra,  a cornercorner with one O(21)Fe3Sb trigonal pyramid,  a cornercorner with one O(23)Fe3Sb trigonal pyramid,  an edgeedge with one O(5)Y3Fe tetrahedra, and  an edgeedge with one O(6)YFe3 tetrahedra. In the twenty-eighth O site, O(28) is bonded to one Y(1), one Y(2), one Y(4), and one Fe(11) atom to form distorted OY3Fe tetrahedra that share  a cornercorner with one O(13)YFe2Sb tetrahedra,  a cornercorner with one O(19)YFe2Sb tetrahedra,  a cornercorner with one O(8)YFe2Sb tetrahedra,  a cornercorner with one O(6)YFe3 tetrahedra, corners with two equivalent O(5)Y3Fe tetrahedra, corners with two equivalent O(12)YFe3 tetrahedra,  an edgeedge with one O(2)Y3Fe tetrahedra,  an edgeedge with one O(24)Y3Fe tetrahedra, and  an edgeedge with one O(1)YFe3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y4Fe13Si2(SbO14)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   9.546
_cell_length_c   12.334
_cell_angle_alpha   87.586
_cell_angle_beta   76.677
_cell_angle_gamma   79.802
_symmetry_Int_Tables_number   1
_cell_volume   643.050
_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
  Y  Y0  1  0.073  0.656  0.411  1.0
  Y  Y1  1  0.515  0.346  0.412  1.0
  Y  Y2  1  0.926  0.347  0.588  1.0
  Y  Y3  1  0.485  0.657  0.588  1.0
  Fe  Fe4  1  0.922  0.647  0.737  1.0
  Fe  Fe5  1  0.664  0.316  0.126  1.0
  Fe  Fe6  1  0.343  0.354  0.737  1.0
  Fe  Fe7  1  0.079  0.353  0.263  1.0
  Fe  Fe8  1  0.336  0.683  0.874  1.0
  Fe  Fe9  1  0.287  0.001  0.425  1.0
  Fe  Fe10  1  0.209  0.682  0.126  1.0
  Fe  Fe11  1  1.000  0.000  0.000  1.0
  Fe  Fe12  1  0.427  0.999  0.149  1.0
  Fe  Fe13  1  0.791  0.317  0.873  1.0
  Fe  Fe14  1  0.658  0.646  0.262  1.0
  Fe  Fe15  1  0.576  0.999  0.851  1.0
  Fe  Fe16  1  0.712  0.001  0.577  1.0
  Si  Si17  1  0.244  0.280  1.000  1.0
  Si  Si18  1  0.757  0.718  1.000  1.0
  Sb  Sb19  1  0.855  1.000  0.286  1.0
  Sb  Sb20  1  0.143  0.000  0.714  1.0
  O  O21  1  0.714  0.409  0.256  1.0
  O  O22  1  0.127  0.391  0.419  1.0
  O  O23  1  0.955  0.337  1.000  1.0
  O  O24  1  0.295  0.104  0.000  1.0
  O  O25  1  0.873  0.610  0.580  1.0
  O  O26  1  0.287  0.591  0.743  1.0
  O  O27  1  0.010  0.112  0.587  1.0
  O  O28  1  0.977  0.893  0.420  1.0
  O  O29  1  0.707  0.894  1.000  1.0
  O  O30  1  0.121  0.896  0.161  1.0
  O  O31  1  0.314  0.337  0.111  1.0
  O  O32  1  0.028  0.589  0.257  1.0
  O  O33  1  0.397  0.893  0.581  1.0
  O  O34  1  0.725  0.102  0.157  1.0
  O  O35  1  0.575  0.661  0.110  1.0
  O  O36  1  0.045  0.661  1.000  1.0
  O  O37  1  0.281  0.897  0.841  1.0
  O  O38  1  0.882  0.102  0.842  1.0
  O  O39  1  0.595  0.110  0.413  1.0
  O  O40  1  0.114  0.119  0.294  1.0
  O  O41  1  0.887  0.879  0.708  1.0
  O  O42  1  0.425  0.338  0.890  1.0
  O  O43  1  0.411  0.119  0.707  1.0
  O  O44  1  0.546  0.391  0.580  1.0
  O  O45  1  0.687  0.661  0.889  1.0
  O  O46  1  0.596  0.878  0.291  1.0
  O  O47  1  0.973  0.411  0.743  1.0
  O  O48  1  0.453  0.610  0.419  1.0
[/CIF]
.