Li4Ti3Fe3(CoO8)2 is Spinel-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(11), one O(12), one O(15), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, and corners with three equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-66°. In the second Li site, Li(2) is bonded in a distorted rectangular see-saw-like geometry to one O(14), one O(16), one O(5), and one O(9) atom. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  an edgeedge with one Ti(3)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and  an edgeedge with one Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-64°. In the fourth Li site, Li(4) is bonded to one O(13), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, and corners with three equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-66°. There are three inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(14), one O(2), one O(3), one O(4), one O(7), and one O(9) atom to form TiO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Ti(2)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the second Ti site, Ti(2) is bonded to one O(16), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form TiO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Ti(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. In the third Ti site, Ti(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(5), and one O(6) atom to form TiO6 octahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-51°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(14), one O(16), one O(3), one O(4), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Ti(1)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(15), and one O(5) atom to form FeO6 octahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Ti(3)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-50°. In the third Fe site, Fe(3) is bonded to one O(10), one O(12), one O(13), one O(15), one O(5), and one O(6) atom to form FeO6 octahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Ti(3)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-53°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(2), one O(6), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Ti(3)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with three equivalent Li(3)O4 tetrahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Ti(1)O6 octahedra,  an edgeedge with one Ti(2)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-53°. In the second Co site, Co(2) is bonded to one O(11), one O(12), one O(14), one O(15), one O(16), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Li(1)O4 tetrahedra,  an edgeedge with one Ti(3)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and  an edgeedge with one Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Ti(3), one Fe(2), and one Co(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Li(4), one Ti(1), one Ti(2), and one Co(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Ti(1), one Ti(2), and one Fe(1) atom. In the fourth O site, O(4) is bonded to one Li(3), one Ti(1), one Ti(2), and one Fe(1) atom to form distorted OLiTi2Fe tetrahedra that share corners with two equivalent O(7)LiTiFeCo tetrahedra, corners with two equivalent O(8)LiTiFeCo tetrahedra, and  a cornercorner with one O(10)LiFe2Co trigonal pyramid. In the fifth O site, O(5) is bonded to one Li(2), one Ti(3), one Fe(2), and one Fe(3) atom to form a mixture of edge and corner-sharing OLiTiFe2 tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Ti(3), one Fe(3), and one Co(1) atom. In the seventh O site, O(7) is bonded to one Li(4), one Ti(1), one Fe(1), and one Co(1) atom to form distorted OLiTiFeCo tetrahedra that share  a cornercorner with one O(8)LiTiFeCo tetrahedra, corners with two equivalent O(4)LiTi2Fe tetrahedra,  a cornercorner with one O(10)LiFe2Co trigonal pyramid, and  an edgeedge with one O(8)LiTiFeCo tetrahedra. In the eighth O site, O(8) is bonded to one Li(4), one Ti(2), one Fe(1), and one Co(1) atom to form distorted OLiTiFeCo tetrahedra that share  a cornercorner with one O(7)LiTiFeCo tetrahedra, corners with two equivalent O(4)LiTi2Fe tetrahedra,  a cornercorner with one O(10)LiFe2Co trigonal pyramid, and  an edgeedge with one O(7)LiTiFeCo tetrahedra. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Li(2), one Ti(1), one Ti(2), and one Co(2) atom. In the tenth O site, O(10) is bonded to one Li(3), one Fe(2), one Fe(3), and one Co(1) atom to form distorted OLiFe2Co trigonal pyramids that share  a cornercorner with one O(4)LiTi2Fe tetrahedra,  a cornercorner with one O(7)LiTiFeCo tetrahedra,  a cornercorner with one O(8)LiTiFeCo tetrahedra, corners with two equivalent O(15)LiFe2Co tetrahedra, and  an edgeedge with one O(5)LiTiFe2 tetrahedra. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Ti(3), one Fe(2), and one Co(2) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Ti(3), one Fe(3), and one Co(2) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one Li(4), one Ti(3), one Fe(2), and one Fe(3) atom. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Li(2), one Ti(1), one Fe(1), and one Co(2) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Fe(2), one Fe(3), and one Co(2) atom to form distorted OLiFe2Co tetrahedra that share corners with two equivalent O(5)LiTiFe2 tetrahedra and corners with two equivalent O(10)LiFe2Co trigonal pyramids. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Li(2), one Ti(2), one Fe(1), and one Co(2) atom.
Li4Ti3Fe3(CoO8)2 is Spinel-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(11), one O(12), one O(15), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, and corners with three equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-66°. The Li(1)-O(11) bond length is 1.97 Å. The Li(1)-O(12) bond length is 1.97 Å. The Li(1)-O(15) bond length is 1.96 Å. The Li(1)-O(3) bond length is 1.94 Å. In the second Li site, Li(2) is bonded in a distorted rectangular see-saw-like geometry to one O(14), one O(16), one O(5), and one O(9) atom. The Li(2)-O(14) bond length is 1.97 Å. The Li(2)-O(16) bond length is 1.99 Å. The Li(2)-O(5) bond length is 1.78 Å. The Li(2)-O(9) bond length is 2.08 Å. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  an edgeedge with one Ti(3)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and  an edgeedge with one Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-64°. The Li(3)-O(1) bond length is 1.98 Å. The Li(3)-O(10) bond length is 1.93 Å. The Li(3)-O(4) bond length is 1.77 Å. The Li(3)-O(6) bond length is 2.01 Å. In the fourth Li site, Li(4) is bonded to one O(13), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, and corners with three equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-66°. The Li(4)-O(13) bond length is 1.95 Å. The Li(4)-O(2) bond length is 1.94 Å. The Li(4)-O(7) bond length is 1.97 Å. The Li(4)-O(8) bond length is 1.96 Å. There are three inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(14), one O(2), one O(3), one O(4), one O(7), and one O(9) atom to form TiO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Ti(2)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. The Ti(1)-O(14) bond length is 2.01 Å. The Ti(1)-O(2) bond length is 1.99 Å. The Ti(1)-O(3) bond length is 1.96 Å. The Ti(1)-O(4) bond length is 1.93 Å. The Ti(1)-O(7) bond length is 1.97 Å. The Ti(1)-O(9) bond length is 1.99 Å. In the second Ti site, Ti(2) is bonded to one O(16), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form TiO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Ti(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. The Ti(2)-O(16) bond length is 2.00 Å. The Ti(2)-O(2) bond length is 2.01 Å. The Ti(2)-O(3) bond length is 1.95 Å. The Ti(2)-O(4) bond length is 1.93 Å. The Ti(2)-O(8) bond length is 1.98 Å. The Ti(2)-O(9) bond length is 2.00 Å. In the third Ti site, Ti(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(5), and one O(6) atom to form TiO6 octahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-51°. The Ti(3)-O(1) bond length is 2.06 Å. The Ti(3)-O(11) bond length is 1.99 Å. The Ti(3)-O(12) bond length is 1.94 Å. The Ti(3)-O(13) bond length is 2.01 Å. The Ti(3)-O(5) bond length is 1.94 Å. The Ti(3)-O(6) bond length is 2.02 Å. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(14), one O(16), one O(3), one O(4), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Ti(1)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. The Fe(1)-O(14) bond length is 2.03 Å. The Fe(1)-O(16) bond length is 2.03 Å. The Fe(1)-O(3) bond length is 2.02 Å. The Fe(1)-O(4) bond length is 1.97 Å. The Fe(1)-O(7) bond length is 2.06 Å. The Fe(1)-O(8) bond length is 2.04 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(15), and one O(5) atom to form FeO6 octahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Ti(3)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-50°. The Fe(2)-O(1) bond length is 1.93 Å. The Fe(2)-O(10) bond length is 1.96 Å. The Fe(2)-O(11) bond length is 1.96 Å. The Fe(2)-O(13) bond length is 1.93 Å. The Fe(2)-O(15) bond length is 1.93 Å. The Fe(2)-O(5) bond length is 1.94 Å. In the third Fe site, Fe(3) is bonded to one O(10), one O(12), one O(13), one O(15), one O(5), and one O(6) atom to form FeO6 octahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Ti(3)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-53°. The Fe(3)-O(10) bond length is 2.07 Å. The Fe(3)-O(12) bond length is 2.07 Å. The Fe(3)-O(13) bond length is 1.86 Å. The Fe(3)-O(15) bond length is 2.06 Å. The Fe(3)-O(5) bond length is 1.90 Å. The Fe(3)-O(6) bond length is 1.96 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(2), one O(6), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Ti(3)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with three equivalent Li(3)O4 tetrahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Ti(1)O6 octahedra,  an edgeedge with one Ti(2)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-53°. The Co(1)-O(1) bond length is 2.03 Å. The Co(1)-O(10) bond length is 1.98 Å. The Co(1)-O(2) bond length is 1.98 Å. The Co(1)-O(6) bond length is 1.94 Å. The Co(1)-O(7) bond length is 1.96 Å. The Co(1)-O(8) bond length is 1.95 Å. In the second Co site, Co(2) is bonded to one O(11), one O(12), one O(14), one O(15), one O(16), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Li(1)O4 tetrahedra,  an edgeedge with one Ti(3)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and  an edgeedge with one Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. The Co(2)-O(11) bond length is 1.95 Å. The Co(2)-O(12) bond length is 1.95 Å. The Co(2)-O(14) bond length is 1.98 Å. The Co(2)-O(15) bond length is 1.90 Å. The Co(2)-O(16) bond length is 1.97 Å. The Co(2)-O(9) bond length is 2.04 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Ti(3), one Fe(2), and one Co(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Li(4), one Ti(1), one Ti(2), and one Co(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Ti(1), one Ti(2), and one Fe(1) atom. In the fourth O site, O(4) is bonded to one Li(3), one Ti(1), one Ti(2), and one Fe(1) atom to form distorted OLiTi2Fe tetrahedra that share corners with two equivalent O(7)LiTiFeCo tetrahedra, corners with two equivalent O(8)LiTiFeCo tetrahedra, and  a cornercorner with one O(10)LiFe2Co trigonal pyramid. In the fifth O site, O(5) is bonded to one Li(2), one Ti(3), one Fe(2), and one Fe(3) atom to form a mixture of edge and corner-sharing OLiTiFe2 tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Ti(3), one Fe(3), and one Co(1) atom. In the seventh O site, O(7) is bonded to one Li(4), one Ti(1), one Fe(1), and one Co(1) atom to form distorted OLiTiFeCo tetrahedra that share  a cornercorner with one O(8)LiTiFeCo tetrahedra, corners with two equivalent O(4)LiTi2Fe tetrahedra,  a cornercorner with one O(10)LiFe2Co trigonal pyramid, and  an edgeedge with one O(8)LiTiFeCo tetrahedra. In the eighth O site, O(8) is bonded to one Li(4), one Ti(2), one Fe(1), and one Co(1) atom to form distorted OLiTiFeCo tetrahedra that share  a cornercorner with one O(7)LiTiFeCo tetrahedra, corners with two equivalent O(4)LiTi2Fe tetrahedra,  a cornercorner with one O(10)LiFe2Co trigonal pyramid, and  an edgeedge with one O(7)LiTiFeCo tetrahedra. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Li(2), one Ti(1), one Ti(2), and one Co(2) atom. In the tenth O site, O(10) is bonded to one Li(3), one Fe(2), one Fe(3), and one Co(1) atom to form distorted OLiFe2Co trigonal pyramids that share  a cornercorner with one O(4)LiTi2Fe tetrahedra,  a cornercorner with one O(7)LiTiFeCo tetrahedra,  a cornercorner with one O(8)LiTiFeCo tetrahedra, corners with two equivalent O(15)LiFe2Co tetrahedra, and  an edgeedge with one O(5)LiTiFe2 tetrahedra. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Ti(3), one Fe(2), and one Co(2) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Ti(3), one Fe(3), and one Co(2) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one Li(4), one Ti(3), one Fe(2), and one Fe(3) atom. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Li(2), one Ti(1), one Fe(1), and one Co(2) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Fe(2), one Fe(3), and one Co(2) atom to form distorted OLiFe2Co tetrahedra that share corners with two equivalent O(5)LiTiFe2 tetrahedra and corners with two equivalent O(10)LiFe2Co trigonal pyramids. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Li(2), one Ti(2), one Fe(1), and one Co(2) atom.