Y(SnO2)2 is Spinel structured and crystallizes in the trigonal R-3m space group. Y(1) is bonded to one O(2) and three equivalent O(1) atoms to form YO4 tetrahedra that share corners with three equivalent Sn(2)O6 octahedra and corners with nine equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-61°. 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 corners with six equivalent Y(1)O4 tetrahedra, 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 Y(1)O4 tetrahedra and edges with six equivalent Sn(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Y(1), one Sn(2), and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Y(1) and three equivalent Sn(1) atoms.
Y(SnO2)2 is Spinel structured and crystallizes in the trigonal R-3m space group. Y(1) is bonded to one O(2) and three equivalent O(1) atoms to form YO4 tetrahedra that share corners with three equivalent Sn(2)O6 octahedra and corners with nine equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-61°. The Y(1)-O(2) bond length is 2.09 Å. All Y(1)-O(1) bond lengths are 2.23 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 corners with six equivalent Y(1)O4 tetrahedra, 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 2.45 Å. All Sn(1)-O(1) bond lengths are 2.55 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 Y(1)O4 tetrahedra and edges with six equivalent Sn(1)O6 octahedra. All Sn(2)-O(1) bond lengths are 2.15 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Y(1), one Sn(2), and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Y(1) and three equivalent Sn(1) atoms.