FeCo3O8 is trigonal omega-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(13), one O(2), one O(28), one O(7), and one O(8) atom to form FeO6 octahedra that share  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(6)O6 octahedra. In the second Fe site, Fe(2) is bonded to one O(10), one O(15), one O(16), one O(21), one O(4), and one O(9) atom to form FeO6 octahedra that share  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. In the third Fe site, Fe(3) is bonded to one O(12), one O(17), one O(18), one O(23), one O(24), and one O(29) atom to form distorted FeO6 octahedra that share  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to one O(20), one O(25), one O(26), one O(31), one O(32), and one O(5) atom to form FeO6 octahedra that share  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. There are twelve inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(30), one O(4), one O(6), and one O(9) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. In the second Co site, Co(2) is bonded to one O(10), one O(3), one O(31), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. In the third Co site, Co(3) is bonded to one O(11), one O(3), one O(32), one O(5), one O(7), and one O(8) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(6)O6 octahedra. In the fourth Co site, Co(4) is bonded to one O(10), one O(12), one O(14), one O(17), one O(6), and one O(9) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(7)O6 octahedra. In the fifth Co site, Co(5) is bonded to one O(11), one O(12), one O(13), one O(14), one O(18), and one O(7) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra, and  an edgeedge with one Co(7)O6 octahedra. In the sixth Co site, Co(6) is bonded to one O(11), one O(13), one O(15), one O(16), one O(19), and one O(8) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. In the seventh Co site, Co(7) is bonded to one O(14), one O(17), one O(18), one O(20), one O(22), and one O(25) atom to form CoO6 octahedra that share  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. In the eighth Co site, Co(8) is bonded to one O(15), one O(19), one O(20), one O(21), one O(22), and one O(26) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. In the ninth Co site, Co(9) is bonded to one O(16), one O(19), one O(21), one O(23), one O(24), and one O(27) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. In the tenth Co site, Co(10) is bonded to one O(1), one O(22), one O(25), one O(26), one O(28), and one O(30) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. In the eleventh Co site, Co(11) is bonded to one O(2), one O(23), one O(27), one O(28), one O(29), and one O(30) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. In the twelfth Co site, Co(12) is bonded to one O(24), one O(27), one O(29), one O(3), one O(31), and one O(32) atom to form CoO6 octahedra that share  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. There are thirty-two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(1), and one Co(10) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(1), and one Co(11) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Co(12), one Co(2), and one Co(3) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(1), and one Co(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(2), and one Co(3) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Co(1), one Co(2), and one Co(4) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(3), and one Co(5) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(3), and one Co(6) atom. In the ninth O site, O(9) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(1), and one Co(4) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(2), and one Co(4) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one Co(3), one Co(5), and one Co(6) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Fe(3), one Co(4), and one Co(5) atom. In the thirteenth O site, O(13) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(5), and one Co(6) atom. In the fourteenth O site, O(14) is bonded in a distorted T-shaped geometry to one Co(4), one Co(5), and one Co(7) atom. In the fifteenth O site, O(15) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(6), and one Co(8) atom. In the sixteenth O site, O(16) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(6), and one Co(9) atom. In the seventeenth O site, O(17) is bonded in a 3-coordinate geometry to one Fe(3), one Co(4), and one Co(7) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one Fe(3), one Co(5), and one Co(7) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one Co(6), one Co(8), and one Co(9) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Fe(4), one Co(7), and one Co(8) atom. In the twenty-first O site, O(21) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(8), and one Co(9) atom. In the twenty-second O site, O(22) is bonded in a distorted T-shaped geometry to one Co(10), one Co(7), and one Co(8) atom. In the twenty-third O site, O(23) is bonded in a distorted T-shaped geometry to one Fe(3), one Co(11), and one Co(9) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Fe(3), one Co(12), and one Co(9) atom. In the twenty-fifth O site, O(25) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(10), and one Co(7) atom. In the twenty-sixth O site, O(26) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(10), and one Co(8) atom. In the twenty-seventh O site, O(27) is bonded in a distorted T-shaped geometry to one Co(11), one Co(12), and one Co(9) atom. In the twenty-eighth O site, O(28) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(10), and one Co(11) atom. In the twenty-ninth O site, O(29) is bonded in a distorted T-shaped geometry to one Fe(3), one Co(11), and one Co(12) atom. In the thirtieth O site, O(30) is bonded in a distorted T-shaped geometry to one Co(1), one Co(10), and one Co(11) atom. In the thirty-first O site, O(31) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(12), and one Co(2) atom. In the thirty-second O site, O(32) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(12), and one Co(3) atom.
FeCo3O8 is trigonal omega-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(13), one O(2), one O(28), one O(7), and one O(8) atom to form FeO6 octahedra that share  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(6)O6 octahedra. The Fe(1)-O(1) bond length is 1.94 Å. The Fe(1)-O(13) bond length is 1.95 Å. The Fe(1)-O(2) bond length is 2.05 Å. The Fe(1)-O(28) bond length is 1.95 Å. The Fe(1)-O(7) bond length is 1.93 Å. The Fe(1)-O(8) bond length is 2.10 Å. In the second Fe site, Fe(2) is bonded to one O(10), one O(15), one O(16), one O(21), one O(4), and one O(9) atom to form FeO6 octahedra that share  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. The Fe(2)-O(10) bond length is 1.93 Å. The Fe(2)-O(15) bond length is 1.91 Å. The Fe(2)-O(16) bond length is 1.92 Å. The Fe(2)-O(21) bond length is 1.91 Å. The Fe(2)-O(4) bond length is 1.94 Å. The Fe(2)-O(9) bond length is 1.92 Å. In the third Fe site, Fe(3) is bonded to one O(12), one O(17), one O(18), one O(23), one O(24), and one O(29) atom to form distorted FeO6 octahedra that share  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. The Fe(3)-O(12) bond length is 2.05 Å. The Fe(3)-O(17) bond length is 2.04 Å. The Fe(3)-O(18) bond length is 2.04 Å. The Fe(3)-O(23) bond length is 2.03 Å. The Fe(3)-O(24) bond length is 2.06 Å. The Fe(3)-O(29) bond length is 2.03 Å. In the fourth Fe site, Fe(4) is bonded to one O(20), one O(25), one O(26), one O(31), one O(32), and one O(5) atom to form FeO6 octahedra that share  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. The Fe(4)-O(20) bond length is 1.94 Å. The Fe(4)-O(25) bond length is 1.94 Å. The Fe(4)-O(26) bond length is 2.08 Å. The Fe(4)-O(31) bond length is 1.95 Å. The Fe(4)-O(32) bond length is 2.05 Å. The Fe(4)-O(5) bond length is 1.92 Å. There are twelve inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(30), one O(4), one O(6), and one O(9) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. The Co(1)-O(1) bond length is 1.89 Å. The Co(1)-O(2) bond length is 1.85 Å. The Co(1)-O(30) bond length is 1.90 Å. The Co(1)-O(4) bond length is 1.91 Å. The Co(1)-O(6) bond length is 1.89 Å. The Co(1)-O(9) bond length is 1.93 Å. In the second Co site, Co(2) is bonded to one O(10), one O(3), one O(31), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. The Co(2)-O(10) bond length is 1.88 Å. The Co(2)-O(3) bond length is 1.87 Å. The Co(2)-O(31) bond length is 1.87 Å. The Co(2)-O(4) bond length is 1.91 Å. The Co(2)-O(5) bond length is 1.93 Å. The Co(2)-O(6) bond length is 1.92 Å. In the third Co site, Co(3) is bonded to one O(11), one O(3), one O(32), one O(5), one O(7), and one O(8) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(6)O6 octahedra. The Co(3)-O(11) bond length is 1.89 Å. The Co(3)-O(3) bond length is 1.91 Å. The Co(3)-O(32) bond length is 1.85 Å. The Co(3)-O(5) bond length is 1.91 Å. The Co(3)-O(7) bond length is 1.93 Å. The Co(3)-O(8) bond length is 1.87 Å. In the fourth Co site, Co(4) is bonded to one O(10), one O(12), one O(14), one O(17), one O(6), and one O(9) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(7)O6 octahedra. The Co(4)-O(10) bond length is 1.95 Å. The Co(4)-O(12) bond length is 1.86 Å. The Co(4)-O(14) bond length is 1.90 Å. The Co(4)-O(17) bond length is 1.86 Å. The Co(4)-O(6) bond length is 1.88 Å. The Co(4)-O(9) bond length is 1.92 Å. In the fifth Co site, Co(5) is bonded to one O(11), one O(12), one O(13), one O(14), one O(18), and one O(7) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra, and  an edgeedge with one Co(7)O6 octahedra. The Co(5)-O(11) bond length is 1.89 Å. The Co(5)-O(12) bond length is 1.87 Å. The Co(5)-O(13) bond length is 1.94 Å. The Co(5)-O(14) bond length is 1.91 Å. The Co(5)-O(18) bond length is 1.85 Å. The Co(5)-O(7) bond length is 1.91 Å. In the sixth Co site, Co(6) is bonded to one O(11), one O(13), one O(15), one O(16), one O(19), and one O(8) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. The Co(6)-O(11) bond length is 1.92 Å. The Co(6)-O(13) bond length is 1.87 Å. The Co(6)-O(15) bond length is 1.95 Å. The Co(6)-O(16) bond length is 1.91 Å. The Co(6)-O(19) bond length is 1.89 Å. The Co(6)-O(8) bond length is 1.83 Å. In the seventh Co site, Co(7) is bonded to one O(14), one O(17), one O(18), one O(20), one O(22), and one O(25) atom to form CoO6 octahedra that share  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. The Co(7)-O(14) bond length is 1.89 Å. The Co(7)-O(17) bond length is 1.85 Å. The Co(7)-O(18) bond length is 1.86 Å. The Co(7)-O(20) bond length is 1.92 Å. The Co(7)-O(22) bond length is 1.89 Å. The Co(7)-O(25) bond length is 1.94 Å. In the eighth Co site, Co(8) is bonded to one O(15), one O(19), one O(20), one O(21), one O(22), and one O(26) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. The Co(8)-O(15) bond length is 1.91 Å. The Co(8)-O(19) bond length is 1.88 Å. The Co(8)-O(20) bond length is 1.88 Å. The Co(8)-O(21) bond length is 1.94 Å. The Co(8)-O(22) bond length is 1.91 Å. The Co(8)-O(26) bond length is 1.84 Å. In the ninth Co site, Co(9) is bonded to one O(16), one O(19), one O(21), one O(23), one O(24), and one O(27) atom to form CoO6 octahedra that share  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. The Co(9)-O(16) bond length is 1.94 Å. The Co(9)-O(19) bond length is 1.91 Å. The Co(9)-O(21) bond length is 1.92 Å. The Co(9)-O(23) bond length is 1.86 Å. The Co(9)-O(24) bond length is 1.86 Å. The Co(9)-O(27) bond length is 1.87 Å. In the tenth Co site, Co(10) is bonded to one O(1), one O(22), one O(25), one O(26), one O(28), and one O(30) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, and  an edgeedge with one Co(8)O6 octahedra. The Co(10)-O(1) bond length is 1.93 Å. The Co(10)-O(22) bond length is 1.88 Å. The Co(10)-O(25) bond length is 1.87 Å. The Co(10)-O(26) bond length is 1.88 Å. The Co(10)-O(28) bond length is 1.87 Å. The Co(10)-O(30) bond length is 1.92 Å. In the eleventh Co site, Co(11) is bonded to one O(2), one O(23), one O(27), one O(28), one O(29), and one O(30) atom to form CoO6 octahedra that share  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. The Co(11)-O(2) bond length is 1.87 Å. The Co(11)-O(23) bond length is 1.87 Å. The Co(11)-O(27) bond length is 1.91 Å. The Co(11)-O(28) bond length is 1.93 Å. The Co(11)-O(29) bond length is 1.87 Å. The Co(11)-O(30) bond length is 1.90 Å. In the twelfth Co site, Co(12) is bonded to one O(24), one O(27), one O(29), one O(3), one O(31), and one O(32) atom to form CoO6 octahedra that share  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and  an edgeedge with one Co(9)O6 octahedra. The Co(12)-O(24) bond length is 1.85 Å. The Co(12)-O(27) bond length is 1.90 Å. The Co(12)-O(29) bond length is 1.87 Å. The Co(12)-O(3) bond length is 1.91 Å. The Co(12)-O(31) bond length is 1.94 Å. The Co(12)-O(32) bond length is 1.88 Å. There are thirty-two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(1), and one Co(10) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(1), and one Co(11) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Co(12), one Co(2), and one Co(3) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(1), and one Co(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(2), and one Co(3) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Co(1), one Co(2), and one Co(4) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(3), and one Co(5) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(3), and one Co(6) atom. In the ninth O site, O(9) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(1), and one Co(4) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(2), and one Co(4) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one Co(3), one Co(5), and one Co(6) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Fe(3), one Co(4), and one Co(5) atom. In the thirteenth O site, O(13) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(5), and one Co(6) atom. In the fourteenth O site, O(14) is bonded in a distorted T-shaped geometry to one Co(4), one Co(5), and one Co(7) atom. In the fifteenth O site, O(15) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(6), and one Co(8) atom. In the sixteenth O site, O(16) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(6), and one Co(9) atom. In the seventeenth O site, O(17) is bonded in a 3-coordinate geometry to one Fe(3), one Co(4), and one Co(7) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one Fe(3), one Co(5), and one Co(7) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one Co(6), one Co(8), and one Co(9) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Fe(4), one Co(7), and one Co(8) atom. In the twenty-first O site, O(21) is bonded in a distorted T-shaped geometry to one Fe(2), one Co(8), and one Co(9) atom. In the twenty-second O site, O(22) is bonded in a distorted T-shaped geometry to one Co(10), one Co(7), and one Co(8) atom. In the twenty-third O site, O(23) is bonded in a distorted T-shaped geometry to one Fe(3), one Co(11), and one Co(9) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Fe(3), one Co(12), and one Co(9) atom. In the twenty-fifth O site, O(25) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(10), and one Co(7) atom. In the twenty-sixth O site, O(26) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(10), and one Co(8) atom. In the twenty-seventh O site, O(27) is bonded in a distorted T-shaped geometry to one Co(11), one Co(12), and one Co(9) atom. In the twenty-eighth O site, O(28) is bonded in a distorted T-shaped geometry to one Fe(1), one Co(10), and one Co(11) atom. In the twenty-ninth O site, O(29) is bonded in a distorted T-shaped geometry to one Fe(3), one Co(11), and one Co(12) atom. In the thirtieth O site, O(30) is bonded in a distorted T-shaped geometry to one Co(1), one Co(10), and one Co(11) atom. In the thirty-first O site, O(31) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(12), and one Co(2) atom. In the thirty-second O site, O(32) is bonded in a distorted T-shaped geometry to one Fe(4), one Co(12), and one Co(3) atom.