Li3Co2(SiO4)2 is Clathrate-derived structured and crystallizes in the monoclinic Cm space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form LiO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form distorted LiO4 tetrahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. Co(1) is bonded to one O(1), one O(2), one O(4), 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 Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Co(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, and corners with four equivalent Co(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Co(1), and one Si(1) atom to form OLi2CoSi trigonal pyramids that share corners with two equivalent O(5)Li3Si tetrahedra, corners with two equivalent O(6)LiCo2Si tetrahedra, and  an edgeedge with one O(2)Li2CoSi trigonal pyramid. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Li(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Li(1), one Co(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(2), two equivalent Li(1), and one Si(2) atom to form distorted OLi3Si tetrahedra that share corners with two equivalent O(6)LiCo2Si tetrahedra and corners with four equivalent O(2)Li2CoSi trigonal pyramids. In the sixth O site, O(6) is bonded to one Li(2), two equivalent Co(1), and one Si(2) atom to form distorted OLiCo2Si tetrahedra that share corners with two equivalent O(5)Li3Si tetrahedra and corners with four equivalent O(2)Li2CoSi trigonal pyramids.
Li3Co2(SiO4)2 is Clathrate-derived structured and crystallizes in the monoclinic Cm space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form LiO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The Li(1)-O(2) bond length is 2.09 Å. The Li(1)-O(3) bond length is 1.92 Å. The Li(1)-O(4) bond length is 1.98 Å. The Li(1)-O(5) bond length is 2.00 Å. In the second Li site, Li(2) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form distorted LiO4 tetrahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The Li(2)-O(5) bond length is 1.92 Å. The Li(2)-O(6) bond length is 2.17 Å. Both Li(2)-O(2) bond lengths are 2.13 Å. Co(1) is bonded to one O(1), one O(2), one O(4), 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 Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Co(1)O4 tetrahedra. The Co(1)-O(1) bond length is 1.97 Å. The Co(1)-O(2) bond length is 1.90 Å. The Co(1)-O(4) bond length is 1.84 Å. The Co(1)-O(6) bond length is 2.00 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The Si(1)-O(1) bond length is 1.69 Å. The Si(1)-O(3) bond length is 1.58 Å. Both Si(1)-O(2) bond lengths are 1.68 Å. In the second Si site, Si(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, and corners with four equivalent Co(1)O4 tetrahedra. The Si(2)-O(5) bond length is 1.61 Å. The Si(2)-O(6) bond length is 1.72 Å. Both Si(2)-O(4) bond lengths are 1.64 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Co(1), and one Si(1) atom to form OLi2CoSi trigonal pyramids that share corners with two equivalent O(5)Li3Si tetrahedra, corners with two equivalent O(6)LiCo2Si tetrahedra, and  an edgeedge with one O(2)Li2CoSi trigonal pyramid. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Li(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Li(1), one Co(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(2), two equivalent Li(1), and one Si(2) atom to form distorted OLi3Si tetrahedra that share corners with two equivalent O(6)LiCo2Si tetrahedra and corners with four equivalent O(2)Li2CoSi trigonal pyramids. In the sixth O site, O(6) is bonded to one Li(2), two equivalent Co(1), and one Si(2) atom to form distorted OLiCo2Si tetrahedra that share corners with two equivalent O(5)Li3Si tetrahedra and corners with four equivalent O(2)Li2CoSi trigonal pyramids.