Li2Co3(SiO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(11), one O(17), one O(18), and one O(3) atom. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(17), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  an edgeedge with one Li(3)O4 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(16), and one O(21) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Co(9)O4 tetrahedra. In the fourth Li site, Li(4) is bonded in a distorted rectangular see-saw-like geometry to one O(11), one O(19), one O(3), and one O(5) atom. In the fifth Li site, Li(5) is bonded to one O(16), one O(21), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 80°. In the sixth Li site, Li(6) is bonded to one O(13), one O(19), one O(22), one O(24), one O(5), and one O(9) atom to form distorted LiO6 octahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(3)O4 tetrahedra, and  an edgeedge with one Co(6)O4 tetrahedra. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(15), one O(19), one O(24), and one O(5) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 80°. In the second Co site, Co(2) is bonded to one O(16), one O(2), one O(6), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. In the third Co site, Co(3) is bonded to one O(13), one O(14), one O(22), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra, corners with two equivalent Si(6)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 81°. In the fourth Co site, Co(4) is bonded to one O(12), one O(14), one O(23), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra, and corners with two equivalent Si(6)O4 tetrahedra. In the fifth Co site, Co(5) is bonded to one O(15), one O(17), one O(18), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the sixth Co site, Co(6) is bonded to one O(13), one O(18), one O(20), and one O(22) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. In the seventh Co site, Co(7) is bonded to one O(12), one O(20), one O(23), and one O(24) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 80°. In the eighth Co site, Co(8) is bonded to one O(11), one O(2), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the ninth Co site, Co(9) is bonded to one O(1), one O(10), one O(21), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(3)O4 trigonal pyramid, and  an edgeedge with one Li(3)O4 trigonal pyramid. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(18), one O(19), and one O(3) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, and corners with two equivalent Co(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the second Si site, Si(2) is bonded to one O(15), one O(20), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. In the third Si site, Si(3) is bonded to one O(12), one O(24), one O(6), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(8)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. In the fifth Si site, Si(5) is bonded to one O(1), one O(16), one O(17), and one O(2) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. In the sixth Si site, Si(6) is bonded to one O(14), one O(21), one O(22), and one O(23) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 51°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(3), one Co(9), and one Si(5) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(8), and one Si(5) atom. In the third O site, O(3) is bonded to one Li(1), one Li(4), one Co(8), and one Si(1) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(18)LiCo2Si tetrahedra, and corners with two equivalent O(19)Li2CoSi trigonal pyramids. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(8), one Co(9), and one Si(4) atom. In the fifth O site, O(5) is bonded to one Li(4), one Li(6), one Co(1), and one Si(2) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(3)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra,  a cornercorner with one O(19)Li2CoSi trigonal pyramid, and  an edgeedge with one O(19)Li2CoSi trigonal pyramid. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(5), one Co(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(5), and one Si(2) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(2), one Co(4), and one Si(4) atom. In the ninth O site, O(9) is bonded to one Li(5), one Li(6), one Co(3), and one Si(3) atom to form OLi2CoSi tetrahedra that share  a cornercorner with one O(16)Li2CoSi tetrahedra,  a cornercorner with one O(21)Li2CoSi tetrahedra,  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra, and  a cornercorner with one O(19)Li2CoSi trigonal pyramid. In the tenth O site, O(10) is bonded to one Li(2), one Li(3), one Co(9), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(1), one Li(4), one Co(8), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(3) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(1) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Co(3), one Co(4), and one Si(6) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(5), and one Si(2) atom. In the sixteenth O site, O(16) is bonded to one Li(3), one Li(5), one Co(2), and one Si(5) atom to form distorted corner-sharing OLi2CoSi tetrahedra. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Co(5), and one Si(5) atom. In the eighteenth O site, O(18) is bonded to one Li(1), one Co(5), one Co(6), and one Si(1) atom to form distorted corner-sharing OLiCo2Si tetrahedra. In the nineteenth O site, O(19) is bonded to one Li(4), one Li(6), one Co(1), and one Si(1) atom to form distorted OLi2CoSi trigonal pyramids that share  a cornercorner with one O(5)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra,  a cornercorner with one O(18)LiCo2Si tetrahedra, corners with two equivalent O(3)Li2CoSi tetrahedra,  an edgeedge with one O(5)Li2CoSi tetrahedra, and  an edgeedge with one O(24)LiCo2Si tetrahedra. In the twentieth O site, O(20) is bonded in a trigonal planar geometry to one Co(6), one Co(7), and one Si(2) atom. In the twenty-first O site, O(21) is bonded to one Li(3), one Li(5), one Co(9), and one Si(6) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(6) atom. In the twenty-third O site, O(23) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(6) atom. In the twenty-fourth O site, O(24) is bonded to one Li(6), one Co(1), one Co(7), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLiCo2Si tetrahedra.
Li2Co3(SiO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(11), one O(17), one O(18), and one O(3) atom. The Li(1)-O(11) bond length is 2.49 Å. The Li(1)-O(17) bond length is 2.01 Å. The Li(1)-O(18) bond length is 2.44 Å. The Li(1)-O(3) bond length is 2.04 Å. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(17), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  an edgeedge with one Li(3)O4 trigonal pyramid. The Li(2)-O(1) bond length is 1.94 Å. The Li(2)-O(10) bond length is 2.25 Å. The Li(2)-O(17) bond length is 2.07 Å. The Li(2)-O(7) bond length is 2.01 Å. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(16), and one O(21) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Co(9)O4 tetrahedra. The Li(3)-O(1) bond length is 2.02 Å. The Li(3)-O(10) bond length is 2.10 Å. The Li(3)-O(16) bond length is 2.16 Å. The Li(3)-O(21) bond length is 2.11 Å. In the fourth Li site, Li(4) is bonded in a distorted rectangular see-saw-like geometry to one O(11), one O(19), one O(3), and one O(5) atom. The Li(4)-O(11) bond length is 2.03 Å. The Li(4)-O(19) bond length is 2.02 Å. The Li(4)-O(3) bond length is 2.10 Å. The Li(4)-O(5) bond length is 2.14 Å. In the fifth Li site, Li(5) is bonded to one O(16), one O(21), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 80°. The Li(5)-O(16) bond length is 1.99 Å. The Li(5)-O(21) bond length is 2.24 Å. The Li(5)-O(6) bond length is 1.94 Å. The Li(5)-O(9) bond length is 2.17 Å. In the sixth Li site, Li(6) is bonded to one O(13), one O(19), one O(22), one O(24), one O(5), and one O(9) atom to form distorted LiO6 octahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(3)O4 tetrahedra, and  an edgeedge with one Co(6)O4 tetrahedra. The Li(6)-O(13) bond length is 2.44 Å. The Li(6)-O(19) bond length is 2.19 Å. The Li(6)-O(22) bond length is 2.52 Å. The Li(6)-O(24) bond length is 2.19 Å. The Li(6)-O(5) bond length is 2.37 Å. The Li(6)-O(9) bond length is 2.14 Å. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(15), one O(19), one O(24), and one O(5) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 80°. The Co(1)-O(15) bond length is 1.97 Å. The Co(1)-O(19) bond length is 1.97 Å. The Co(1)-O(24) bond length is 2.03 Å. The Co(1)-O(5) bond length is 1.96 Å. In the second Co site, Co(2) is bonded to one O(16), one O(2), one O(6), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. The Co(2)-O(16) bond length is 2.01 Å. The Co(2)-O(2) bond length is 2.03 Å. The Co(2)-O(6) bond length is 1.99 Å. The Co(2)-O(8) bond length is 2.02 Å. In the third Co site, Co(3) is bonded to one O(13), one O(14), one O(22), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra, corners with two equivalent Si(6)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 81°. The Co(3)-O(13) bond length is 1.99 Å. The Co(3)-O(14) bond length is 1.98 Å. The Co(3)-O(22) bond length is 1.99 Å. The Co(3)-O(9) bond length is 1.96 Å. In the fourth Co site, Co(4) is bonded to one O(12), one O(14), one O(23), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra, and corners with two equivalent Si(6)O4 tetrahedra. The Co(4)-O(12) bond length is 1.99 Å. The Co(4)-O(14) bond length is 2.00 Å. The Co(4)-O(23) bond length is 1.97 Å. The Co(4)-O(8) bond length is 1.95 Å. In the fifth Co site, Co(5) is bonded to one O(15), one O(17), one O(18), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Co(5)-O(15) bond length is 1.97 Å. The Co(5)-O(17) bond length is 1.99 Å. The Co(5)-O(18) bond length is 2.00 Å. The Co(5)-O(7) bond length is 1.95 Å. In the sixth Co site, Co(6) is bonded to one O(13), one O(18), one O(20), and one O(22) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The Co(6)-O(13) bond length is 1.98 Å. The Co(6)-O(18) bond length is 1.99 Å. The Co(6)-O(20) bond length is 1.97 Å. The Co(6)-O(22) bond length is 2.05 Å. In the seventh Co site, Co(7) is bonded to one O(12), one O(20), one O(23), and one O(24) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 80°. The Co(7)-O(12) bond length is 1.96 Å. The Co(7)-O(20) bond length is 1.99 Å. The Co(7)-O(23) bond length is 2.01 Å. The Co(7)-O(24) bond length is 2.05 Å. In the eighth Co site, Co(8) is bonded to one O(11), one O(2), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Co(8)-O(11) bond length is 1.98 Å. The Co(8)-O(2) bond length is 1.99 Å. The Co(8)-O(3) bond length is 2.00 Å. The Co(8)-O(4) bond length is 1.96 Å. In the ninth Co site, Co(9) is bonded to one O(1), one O(10), one O(21), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(3)O4 trigonal pyramid, and  an edgeedge with one Li(3)O4 trigonal pyramid. The Co(9)-O(1) bond length is 1.99 Å. The Co(9)-O(10) bond length is 1.97 Å. The Co(9)-O(21) bond length is 2.01 Å. The Co(9)-O(4) bond length is 1.96 Å. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(18), one O(19), and one O(3) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, and corners with two equivalent Co(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-59°. The Si(1)-O(13) bond length is 1.66 Å. The Si(1)-O(18) bond length is 1.66 Å. The Si(1)-O(19) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.64 Å. In the second Si site, Si(2) is bonded to one O(15), one O(20), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. The Si(2)-O(15) bond length is 1.65 Å. The Si(2)-O(20) bond length is 1.66 Å. The Si(2)-O(5) bond length is 1.65 Å. The Si(2)-O(7) bond length is 1.64 Å. In the third Si site, Si(3) is bonded to one O(12), one O(24), one O(6), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. The Si(3)-O(12) bond length is 1.65 Å. The Si(3)-O(24) bond length is 1.68 Å. The Si(3)-O(6) bond length is 1.63 Å. The Si(3)-O(9) bond length is 1.65 Å. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(8)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. The Si(4)-O(10) bond length is 1.65 Å. The Si(4)-O(11) bond length is 1.65 Å. The Si(4)-O(4) bond length is 1.65 Å. The Si(4)-O(8) bond length is 1.66 Å. In the fifth Si site, Si(5) is bonded to one O(1), one O(16), one O(17), and one O(2) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. The Si(5)-O(1) bond length is 1.64 Å. The Si(5)-O(16) bond length is 1.65 Å. The Si(5)-O(17) bond length is 1.65 Å. The Si(5)-O(2) bond length is 1.66 Å. In the sixth Si site, Si(6) is bonded to one O(14), one O(21), one O(22), and one O(23) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 51°. The Si(6)-O(14) bond length is 1.65 Å. The Si(6)-O(21) bond length is 1.63 Å. The Si(6)-O(22) bond length is 1.67 Å. The Si(6)-O(23) bond length is 1.65 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(3), one Co(9), and one Si(5) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(8), and one Si(5) atom. In the third O site, O(3) is bonded to one Li(1), one Li(4), one Co(8), and one Si(1) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(18)LiCo2Si tetrahedra, and corners with two equivalent O(19)Li2CoSi trigonal pyramids. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(8), one Co(9), and one Si(4) atom. In the fifth O site, O(5) is bonded to one Li(4), one Li(6), one Co(1), and one Si(2) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(3)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra,  a cornercorner with one O(19)Li2CoSi trigonal pyramid, and  an edgeedge with one O(19)Li2CoSi trigonal pyramid. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(5), one Co(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(5), and one Si(2) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(2), one Co(4), and one Si(4) atom. In the ninth O site, O(9) is bonded to one Li(5), one Li(6), one Co(3), and one Si(3) atom to form OLi2CoSi tetrahedra that share  a cornercorner with one O(16)Li2CoSi tetrahedra,  a cornercorner with one O(21)Li2CoSi tetrahedra,  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra, and  a cornercorner with one O(19)Li2CoSi trigonal pyramid. In the tenth O site, O(10) is bonded to one Li(2), one Li(3), one Co(9), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(1), one Li(4), one Co(8), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(3) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(1) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Co(3), one Co(4), and one Si(6) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(5), and one Si(2) atom. In the sixteenth O site, O(16) is bonded to one Li(3), one Li(5), one Co(2), and one Si(5) atom to form distorted corner-sharing OLi2CoSi tetrahedra. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Co(5), and one Si(5) atom. In the eighteenth O site, O(18) is bonded to one Li(1), one Co(5), one Co(6), and one Si(1) atom to form distorted corner-sharing OLiCo2Si tetrahedra. In the nineteenth O site, O(19) is bonded to one Li(4), one Li(6), one Co(1), and one Si(1) atom to form distorted OLi2CoSi trigonal pyramids that share  a cornercorner with one O(5)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra,  a cornercorner with one O(18)LiCo2Si tetrahedra, corners with two equivalent O(3)Li2CoSi tetrahedra,  an edgeedge with one O(5)Li2CoSi tetrahedra, and  an edgeedge with one O(24)LiCo2Si tetrahedra. In the twentieth O site, O(20) is bonded in a trigonal planar geometry to one Co(6), one Co(7), and one Si(2) atom. In the twenty-first O site, O(21) is bonded to one Li(3), one Li(5), one Co(9), and one Si(6) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(6) atom. In the twenty-third O site, O(23) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(6) atom. In the twenty-fourth O site, O(24) is bonded to one Li(6), one Co(1), one Co(7), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLiCo2Si tetrahedra.