Ca(SnO2)4 is beta indium sulfide-derived structured and crystallizes in the trigonal R-3m space group. Ca(1) is bonded to six equivalent O(1) atoms to form distorted CaO6 octahedra that share corners with six equivalent Sn(2)O6 octahedra and edges with six equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SnO6 octahedra that share edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Sn(2)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. In the second Sn site, Sn(2) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with six equivalent Ca(1)O6 octahedra and edges with six equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to one Ca(1), one Sn(2), and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Sn(1) atoms.
Ca(SnO2)4 is beta indium sulfide-derived structured and crystallizes in the trigonal R-3m space group. Ca(1) is bonded to six equivalent O(1) atoms to form distorted CaO6 octahedra that share corners with six equivalent Sn(2)O6 octahedra and edges with six equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. All Ca(1)-O(1) bond lengths are 2.43 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SnO6 octahedra that share edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Sn(2)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. Both Sn(1)-O(2) bond lengths are 2.19 Å. All Sn(1)-O(1) bond lengths are 2.13 Å. In the second Sn site, Sn(2) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with six equivalent Ca(1)O6 octahedra and edges with six equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. All Sn(2)-O(1) bond lengths are 2.42 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to one Ca(1), one Sn(2), and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Sn(1) atoms.