Li3Co2(SiO4)2 crystallizes in the triclinic P1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(3), one O(7), and one O(8) atom to form CoO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form CoO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(3), one Co(1), and one Si(1) atom to form corner-sharing OLi2CoSi tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(1), one Co(2), and one Si(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Co(1), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Co(2), and one Si(1) atom to form corner-sharing OLi2CoSi tetrahedra. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Li(2), one Co(2), and one Si(2) atom. In the sixth O site, O(6) is bonded to one Li(1), one Li(3), one Co(2), and one Si(2) atom to form corner-sharing OLi2CoSi tetrahedra. In the seventh O site, O(7) is bonded to one Li(2), one Li(3), one Co(1), and one Si(2) atom to form corner-sharing OLi2CoSi tetrahedra. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(1), one Co(1), and one Si(2) atom.
Li3Co2(SiO4)2 crystallizes in the triclinic P1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Li(1)-O(1) bond length is 1.99 Å. The Li(1)-O(2) bond length is 1.97 Å. The Li(1)-O(6) bond length is 2.18 Å. The Li(1)-O(8) bond length is 1.96 Å. In the second Li site, Li(2) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Li(2)-O(3) bond length is 1.90 Å. The Li(2)-O(4) bond length is 2.10 Å. The Li(2)-O(5) bond length is 2.06 Å. The Li(2)-O(7) bond length is 1.99 Å. In the third Li site, Li(3) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Li(3)-O(1) bond length is 2.06 Å. The Li(3)-O(4) bond length is 2.12 Å. The Li(3)-O(6) bond length is 2.10 Å. The Li(3)-O(7) bond length is 1.99 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(3), one O(7), and one O(8) atom to form CoO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Co(1)-O(1) bond length is 2.02 Å. The Co(1)-O(3) bond length is 1.94 Å. The Co(1)-O(7) bond length is 2.01 Å. The Co(1)-O(8) bond length is 1.96 Å. In the second Co site, Co(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form CoO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Co(2)-O(2) bond length is 1.84 Å. The Co(2)-O(4) bond length is 1.90 Å. The Co(2)-O(5) bond length is 1.85 Å. The Co(2)-O(6) bond length is 1.92 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.66 Å. The Si(1)-O(3) bond length is 1.61 Å. The Si(1)-O(4) bond length is 1.69 Å. In the second Si site, Si(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. The Si(2)-O(5) bond length is 1.66 Å. The Si(2)-O(6) bond length is 1.68 Å. The Si(2)-O(7) bond length is 1.65 Å. The Si(2)-O(8) bond length is 1.62 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(3), one Co(1), and one Si(1) atom to form corner-sharing OLi2CoSi tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(1), one Co(2), and one Si(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Co(1), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Co(2), and one Si(1) atom to form corner-sharing OLi2CoSi tetrahedra. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Li(2), one Co(2), and one Si(2) atom. In the sixth O site, O(6) is bonded to one Li(1), one Li(3), one Co(2), and one Si(2) atom to form corner-sharing OLi2CoSi tetrahedra. In the seventh O site, O(7) is bonded to one Li(2), one Li(3), one Co(1), and one Si(2) atom to form corner-sharing OLi2CoSi tetrahedra. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(1), one Co(1), and one Si(2) atom.