SnSi2O6 crystallizes in the monoclinic C2/c space group. Sn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form SnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with two equivalent Sn(1)O6 octahedra. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-59°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sn(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Sn(1) and one Si(1) atom.
SnSi2O6 crystallizes in the monoclinic C2/c space group. Sn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form SnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with two equivalent Sn(1)O6 octahedra. Both Sn(1)-O(2) bond lengths are 1.97 Å. There are two shorter (2.08 Å) and two longer (2.14 Å) Sn(1)-O(3) bond lengths. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-59°. The Si(1)-O(2) bond length is 1.60 Å. The Si(1)-O(3) bond length is 1.67 Å. There is one shorter (1.61 Å) and one longer (1.62 Å) Si(1)-O(1) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sn(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Sn(1) and one Si(1) atom.