Li6Co(SiO4)2 crystallizes in the triclinic P-1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form distorted LiO4 trigonal pyramids that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Li(3)O5 square pyramids,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 41-76°. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(4) atoms. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form distorted LiO5 square pyramids that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Li(3)O5 square pyramid, edges with two equivalent Si(1)O4 tetrahedra, and edges with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 38-52°. Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with four equivalent Li(3)O5 square pyramids, corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Li(1)O4 trigonal pyramids, edges with two equivalent Li(3)O5 square pyramids, and edges with two equivalent Si(1)O4 tetrahedra. 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  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid, corners with two equivalent Li(1)O4 trigonal pyramids,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Li(3)O5 square pyramids, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 50°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Li(2), one Li(3), one Co(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Li(3), two equivalent Li(2), one Co(1), and one Si(1) atom. In the third O site, O(3) is bonded to one Li(1), two equivalent Li(3), one Co(1), and one Si(1) atom to form distorted OLi3CoSi trigonal bipyramids that share  a cornercorner with one O(4)Li5Si octahedra,  a cornercorner with one O(3)Li3CoSi trigonal bipyramid, edges with two equivalent O(4)Li5Si octahedra, and  an edgeedge with one O(3)Li3CoSi trigonal bipyramid. The corner-sharing octahedral tilt angles are 24°. In the fourth O site, O(4) is bonded to one Li(3), two equivalent Li(1), two equivalent Li(2), and one Si(1) atom to form distorted OLi5Si octahedra that share  a cornercorner with one O(3)Li3CoSi trigonal bipyramid, edges with two equivalent O(4)Li5Si octahedra, and edges with two equivalent O(3)Li3CoSi trigonal bipyramids.
Li6Co(SiO4)2 crystallizes in the triclinic P-1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form distorted LiO4 trigonal pyramids that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Li(3)O5 square pyramids,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 41-76°. The Li(1)-O(1) bond length is 2.12 Å. The Li(1)-O(3) bond length is 1.94 Å. There is one shorter (1.94 Å) and one longer (2.14 Å) Li(1)-O(4) bond length. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(4) atoms. The Li(2)-O(1) bond length is 2.01 Å. There is one shorter (1.93 Å) and one longer (2.54 Å) Li(2)-O(2) bond length. There is one shorter (2.06 Å) and one longer (2.15 Å) Li(2)-O(4) bond length. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form distorted LiO5 square pyramids that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Li(3)O5 square pyramid, edges with two equivalent Si(1)O4 tetrahedra, and edges with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 38-52°. The Li(3)-O(1) bond length is 2.12 Å. The Li(3)-O(2) bond length is 1.99 Å. The Li(3)-O(4) bond length is 2.16 Å. Both Li(3)-O(3) bond lengths are 2.09 Å. Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with four equivalent Li(3)O5 square pyramids, corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Li(1)O4 trigonal pyramids, edges with two equivalent Li(3)O5 square pyramids, and edges with two equivalent Si(1)O4 tetrahedra. Both Co(1)-O(1) bond lengths are 2.23 Å. Both Co(1)-O(2) bond lengths are 2.16 Å. Both Co(1)-O(3) bond lengths are 2.11 Å. 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  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid, corners with two equivalent Li(1)O4 trigonal pyramids,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Li(3)O5 square pyramids, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 50°. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.67 Å. The Si(1)-O(4) bond length is 1.66 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Li(2), one Li(3), one Co(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Li(3), two equivalent Li(2), one Co(1), and one Si(1) atom. In the third O site, O(3) is bonded to one Li(1), two equivalent Li(3), one Co(1), and one Si(1) atom to form distorted OLi3CoSi trigonal bipyramids that share  a cornercorner with one O(4)Li5Si octahedra,  a cornercorner with one O(3)Li3CoSi trigonal bipyramid, edges with two equivalent O(4)Li5Si octahedra, and  an edgeedge with one O(3)Li3CoSi trigonal bipyramid. The corner-sharing octahedral tilt angles are 24°. In the fourth O site, O(4) is bonded to one Li(3), two equivalent Li(1), two equivalent Li(2), and one Si(1) atom to form distorted OLi5Si octahedra that share  a cornercorner with one O(3)Li3CoSi trigonal bipyramid, edges with two equivalent O(4)Li5Si octahedra, and edges with two equivalent O(3)Li3CoSi trigonal bipyramids.