The crystal structure described by Sr2CoO4 is (La,Ba)CuO4-like structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(6), one O(8), one O(9), and two equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(10), one O(14), one O(15), one O(2), one O(5), one O(7), one O(9), and two equivalent O(6) atoms. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(15), one O(16), one O(3), one O(6), one O(8), and two equivalent O(7) atoms. In the fourth Sr site, Sr(4) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(13), one O(16), one O(4), one O(5), one O(7), and two equivalent O(8) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one O(10), one O(14), one O(15), one O(2), one O(4), one O(5), one O(9), and two equivalent O(1) atoms. In the sixth Sr site, Sr(6) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(15), one O(16), one O(3), one O(6), and two equivalent O(2) atoms. In the seventh Sr site, Sr(7) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(13), one O(16), one O(2), one O(4), one O(7), and two equivalent O(3) atoms. In the eighth Sr site, Sr(8) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(3), one O(8), one O(9), and two equivalent O(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(12), one O(13), one O(14), one O(4), one O(5), and one O(9) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second Co site, Co(2) is bonded to one O(11), one O(12), one O(13), one O(16), one O(3), and one O(8) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. In the third Co site, Co(3) is bonded to one O(1), one O(10), one O(14), one O(15), one O(6), and one O(9) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. In the fourth Co site, Co(4) is bonded to one O(10), one O(11), one O(15), one O(16), one O(2), and one O(7) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(6), one Sr(8), two equivalent Sr(5), and one Co(3) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(6)Sr5Co octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra,  an edgeedge with one O(6)Sr5Co octahedra,  an edgeedge with one O(8)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(5)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-59°. In the second O site, O(2) is bonded to one Sr(2), one Sr(5), one Sr(7), two equivalent Sr(6), and one Co(4) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(7)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(5)Sr5Co octahedra,  an edgeedge with one O(7)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(3)Sr5Co octahedra, edges with two equivalent O(6)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-58°. In the third O site, O(3) is bonded to one Sr(3), one Sr(6), one Sr(8), two equivalent Sr(7), and one Co(2) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra,  an edgeedge with one O(6)Sr5Co octahedra,  an edgeedge with one O(8)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(7)Sr5Co octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the fourth O site, O(4) is bonded to one Sr(4), one Sr(5), one Sr(7), two equivalent Sr(8), and one Co(1) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(5)Sr5Co octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(5)Sr5Co octahedra,  an edgeedge with one O(7)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(3)Sr5Co octahedra, edges with two equivalent O(8)Sr5Co octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the fifth O site, O(5) is bonded to one Sr(2), one Sr(4), one Sr(5), two equivalent Sr(1), and one Co(1) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(4)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra,  an edgeedge with one O(4)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(6)Sr5Co octahedra, edges with two equivalent O(8)Sr5Co octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(3), one Sr(6), two equivalent Sr(2), and one Co(3) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(1)Sr5Co octahedra,  an edgeedge with one O(3)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(5)Sr5Co octahedra, edges with two equivalent O(7)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-58°. In the seventh O site, O(7) is bonded to one Sr(2), one Sr(4), one Sr(7), two equivalent Sr(3), and one Co(4) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(2)Sr5Co octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra,  an edgeedge with one O(4)Sr5Co octahedra, edges with two equivalent O(3)Sr5Co octahedra, edges with two equivalent O(6)Sr5Co octahedra, edges with two equivalent O(8)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-59°. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(3), one Sr(8), two equivalent Sr(4), and one Co(2) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(3)Sr5Co octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(1)Sr5Co octahedra,  an edgeedge with one O(3)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(5)Sr5Co octahedra, edges with two equivalent O(7)Sr5Co octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the ninth O site, O(9) is bonded to one Sr(1), one Sr(2), one Sr(5), one Sr(8), one Co(1), and one Co(3) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(10)Sr4Co2 octahedra,  an edgeedge with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra, and faces with two equivalent O(14)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the tenth O site, O(10) is bonded to one Sr(2), one Sr(3), one Sr(5), one Sr(6), one Co(3), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra,  an edgeedge with one O(11)Sr4Co2 octahedra,  an edgeedge with one O(9)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(16)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra, and faces with two equivalent O(15)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-57°. In the eleventh O site, O(11) is bonded to one Sr(3), one Sr(4), one Sr(6), one Sr(7), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(10)Sr4Co2 octahedra,  an edgeedge with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the twelfth O site, O(12) is bonded to one Sr(1), one Sr(4), one Sr(7), one Sr(8), one Co(1), and one Co(2) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(11)Sr4Co2 octahedra,  an edgeedge with one O(9)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(16)Sr4Co2 octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(13)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(4), one Sr(7), one Sr(8), one Co(1), and one Co(2) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(9)Sr4Co2 octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(12)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the fourteenth O site, O(14) is bonded to one Sr(1), one Sr(2), one Sr(5), one Sr(8), one Co(1), and one Co(3) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra, and faces with two equivalent O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the fifteenth O site, O(15) is bonded to one Sr(2), one Sr(3), one Sr(5), one Sr(6), one Co(3), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(9)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra, and faces with two equivalent O(10)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-57°. In the sixteenth O site, O(16) is bonded to one Sr(3), one Sr(4), one Sr(6), one Sr(7), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(11)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. is represented by the CIF file [CIF]
data_Sr2CoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.518
_cell_length_b   5.522
_cell_length_c   6.793
_cell_angle_alpha   66.085
_cell_angle_beta   89.957
_cell_angle_gamma   89.946
_symmetry_Int_Tables_number   1
_cell_volume   189.185
_cell_formula_units_Z   2
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
  Co  Co0  1  0.502  0.500  0.000  1.0
  Co  Co1  1  0.002  0.000  1.000  1.0
  O  O2  1  0.998  0.158  0.687  1.0
  O  O3  1  0.498  0.655  0.687  1.0
  O  O4  1  0.497  0.342  0.313  1.0
  O  O5  1  0.998  0.845  0.313  1.0
  O  O6  1  0.737  0.735  0.999  1.0
  O  O7  1  0.263  0.263  0.000  1.0
  O  O8  1  0.764  0.237  0.999  1.0
  O  O9  1  0.238  0.765  0.001  1.0
  Sr  Sr10  1  0.001  0.360  0.283  1.0
  Sr  Sr11  1  0.501  0.858  0.283  1.0
  Sr  Sr12  1  0.501  0.140  0.717  1.0
  Sr  Sr13  1  0.001  0.642  0.717  1.0
[/CIF]
.
The crystal structure described by Sr2CoO4 is (La,Ba)CuO4-like structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(6), one O(8), one O(9), and two equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(10), one O(14), one O(15), one O(2), one O(5), one O(7), one O(9), and two equivalent O(6) atoms. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(15), one O(16), one O(3), one O(6), one O(8), and two equivalent O(7) atoms. In the fourth Sr site, Sr(4) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(13), one O(16), one O(4), one O(5), one O(7), and two equivalent O(8) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one O(10), one O(14), one O(15), one O(2), one O(4), one O(5), one O(9), and two equivalent O(1) atoms. In the sixth Sr site, Sr(6) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(15), one O(16), one O(3), one O(6), and two equivalent O(2) atoms. In the seventh Sr site, Sr(7) is bonded in a 9-coordinate geometry to one O(11), one O(12), one O(13), one O(16), one O(2), one O(4), one O(7), and two equivalent O(3) atoms. In the eighth Sr site, Sr(8) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(3), one O(8), one O(9), and two equivalent O(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(12), one O(13), one O(14), one O(4), one O(5), and one O(9) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second Co site, Co(2) is bonded to one O(11), one O(12), one O(13), one O(16), one O(3), and one O(8) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. In the third Co site, Co(3) is bonded to one O(1), one O(10), one O(14), one O(15), one O(6), and one O(9) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. In the fourth Co site, Co(4) is bonded to one O(10), one O(11), one O(15), one O(16), one O(2), and one O(7) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(6), one Sr(8), two equivalent Sr(5), and one Co(3) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(6)Sr5Co octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra,  an edgeedge with one O(6)Sr5Co octahedra,  an edgeedge with one O(8)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(5)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-59°. In the second O site, O(2) is bonded to one Sr(2), one Sr(5), one Sr(7), two equivalent Sr(6), and one Co(4) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(7)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(5)Sr5Co octahedra,  an edgeedge with one O(7)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(3)Sr5Co octahedra, edges with two equivalent O(6)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-58°. In the third O site, O(3) is bonded to one Sr(3), one Sr(6), one Sr(8), two equivalent Sr(7), and one Co(2) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra,  an edgeedge with one O(6)Sr5Co octahedra,  an edgeedge with one O(8)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(7)Sr5Co octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the fourth O site, O(4) is bonded to one Sr(4), one Sr(5), one Sr(7), two equivalent Sr(8), and one Co(1) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(5)Sr5Co octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(5)Sr5Co octahedra,  an edgeedge with one O(7)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(3)Sr5Co octahedra, edges with two equivalent O(8)Sr5Co octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the fifth O site, O(5) is bonded to one Sr(2), one Sr(4), one Sr(5), two equivalent Sr(1), and one Co(1) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(4)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra,  an edgeedge with one O(4)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(6)Sr5Co octahedra, edges with two equivalent O(8)Sr5Co octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(3), one Sr(6), two equivalent Sr(2), and one Co(3) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra, corners with two equivalent O(10)Sr4Co2 octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(1)Sr5Co octahedra,  an edgeedge with one O(3)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(5)Sr5Co octahedra, edges with two equivalent O(7)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-58°. In the seventh O site, O(7) is bonded to one Sr(2), one Sr(4), one Sr(7), two equivalent Sr(3), and one Co(4) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(2)Sr5Co octahedra, corners with two equivalent O(11)Sr4Co2 octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra,  an edgeedge with one O(4)Sr5Co octahedra, edges with two equivalent O(3)Sr5Co octahedra, edges with two equivalent O(6)Sr5Co octahedra, edges with two equivalent O(8)Sr5Co octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 3-59°. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(3), one Sr(8), two equivalent Sr(4), and one Co(2) atom to form distorted OSr5Co octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(3)Sr5Co octahedra, corners with two equivalent O(12)Sr4Co2 octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(9)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(1)Sr5Co octahedra,  an edgeedge with one O(3)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(5)Sr5Co octahedra, edges with two equivalent O(7)Sr5Co octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra, and  a faceface with one O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the ninth O site, O(9) is bonded to one Sr(1), one Sr(2), one Sr(5), one Sr(8), one Co(1), and one Co(3) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(10)Sr4Co2 octahedra,  an edgeedge with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra, and faces with two equivalent O(14)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-58°. In the tenth O site, O(10) is bonded to one Sr(2), one Sr(3), one Sr(5), one Sr(6), one Co(3), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra,  an edgeedge with one O(11)Sr4Co2 octahedra,  an edgeedge with one O(9)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(16)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra, and faces with two equivalent O(15)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 1-57°. In the eleventh O site, O(11) is bonded to one Sr(3), one Sr(4), one Sr(6), one Sr(7), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(10)Sr4Co2 octahedra,  a cornercorner with one O(12)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(10)Sr4Co2 octahedra,  an edgeedge with one O(12)Sr4Co2 octahedra,  a faceface with one O(13)Sr4Co2 octahedra,  a faceface with one O(15)Sr4Co2 octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the twelfth O site, O(12) is bonded to one Sr(1), one Sr(4), one Sr(7), one Sr(8), one Co(1), and one Co(2) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(11)Sr4Co2 octahedra,  a cornercorner with one O(9)Sr4Co2 octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(11)Sr4Co2 octahedra,  an edgeedge with one O(9)Sr4Co2 octahedra,  a faceface with one O(14)Sr4Co2 octahedra,  a faceface with one O(16)Sr4Co2 octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(13)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(4), one Sr(7), one Sr(8), one Co(1), and one Co(2) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(9)Sr4Co2 octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(12)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the fourteenth O site, O(14) is bonded to one Sr(1), one Sr(2), one Sr(5), one Sr(8), one Co(1), and one Co(3) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(3)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(6)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(8)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra,  a faceface with one O(5)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra, and faces with two equivalent O(9)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the fifteenth O site, O(15) is bonded to one Sr(2), one Sr(3), one Sr(5), one Sr(6), one Co(3), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(4)Sr5Co octahedra,  a cornercorner with one O(7)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(5)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra,  a faceface with one O(11)Sr4Co2 octahedra,  a faceface with one O(9)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(6)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra, and faces with two equivalent O(10)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-57°. In the sixteenth O site, O(16) is bonded to one Sr(3), one Sr(4), one Sr(6), one Sr(7), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(1)Sr5Co octahedra,  a cornercorner with one O(2)Sr5Co octahedra,  a cornercorner with one O(5)Sr5Co octahedra,  a cornercorner with one O(8)Sr5Co octahedra, corners with two equivalent O(3)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(6)Sr5Co octahedra, corners with two equivalent O(7)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra,  a faceface with one O(10)Sr4Co2 octahedra,  a faceface with one O(12)Sr4Co2 octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(3)Sr5Co octahedra,  a faceface with one O(7)Sr5Co octahedra,  a faceface with one O(8)Sr5Co octahedra, and faces with two equivalent O(11)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. is represented by the CIF file [CIF]
data_Sr2CoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.518
_cell_length_b   5.522
_cell_length_c   6.793
_cell_angle_alpha   66.085
_cell_angle_beta   89.957
_cell_angle_gamma   89.946
_symmetry_Int_Tables_number   1
_cell_volume   189.185
_cell_formula_units_Z   2
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
  Co  Co0  1  0.502  0.500  0.000  1.0
  Co  Co1  1  0.002  0.000  1.000  1.0
  O  O2  1  0.998  0.158  0.687  1.0
  O  O3  1  0.498  0.655  0.687  1.0
  O  O4  1  0.497  0.342  0.313  1.0
  O  O5  1  0.998  0.845  0.313  1.0
  O  O6  1  0.737  0.735  0.999  1.0
  O  O7  1  0.263  0.263  0.000  1.0
  O  O8  1  0.764  0.237  0.999  1.0
  O  O9  1  0.238  0.765  0.001  1.0
  Sr  Sr10  1  0.001  0.360  0.283  1.0
  Sr  Sr11  1  0.501  0.858  0.283  1.0
  Sr  Sr12  1  0.501  0.140  0.717  1.0
  Sr  Sr13  1  0.001  0.642  0.717  1.0
[/CIF]
.