Li2SnSiCO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. Sn(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted SnO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-61°. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Li(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Sn(1), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one Si(1) atom.
Li2SnSiCO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Li(1)-O(1) bond length is 2.00 Å. The Li(1)-O(2) bond length is 2.31 Å. The Li(1)-O(3) bond length is 2.36 Å. The Li(1)-O(4) bond length is 2.21 Å. The Li(1)-O(5) bond length is 2.30 Å. Sn(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted SnO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra. The Sn(1)-O(2) bond length is 2.23 Å. The Sn(1)-O(3) bond length is 2.18 Å. The Sn(1)-O(5) bond length is 2.07 Å. The Sn(1)-O(6) bond length is 2.03 Å. Both Sn(1)-O(4) bond lengths are 2.02 Å. Si(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-61°. The Si(1)-O(5) bond length is 1.65 Å. The Si(1)-O(6) bond length is 1.66 Å. Both Si(1)-O(4) bond lengths are 1.63 Å. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.31 Å. The C(1)-O(3) bond length is 1.34 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Li(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Sn(1), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one Si(1) atom.