Pb2Sn2O7 crystallizes in the cubic Fd-3m space group. Pb(1) is bonded to two equivalent O(2) and six equivalent O(1) atoms to form distorted PbO8 hexagonal bipyramids that share edges with six equivalent Pb(1)O8 hexagonal bipyramids and edges with six equivalent Sn(1)O6 octahedra. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with six equivalent Sn(1)O6 octahedra and edges with six equivalent Pb(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Pb(1) and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra.
Pb2Sn2O7 crystallizes in the cubic Fd-3m space group. Pb(1) is bonded to two equivalent O(2) and six equivalent O(1) atoms to form distorted PbO8 hexagonal bipyramids that share edges with six equivalent Pb(1)O8 hexagonal bipyramids and edges with six equivalent Sn(1)O6 octahedra. Both Pb(1)-O(2) bond lengths are 2.33 Å. All Pb(1)-O(1) bond lengths are 2.62 Å. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with six equivalent Sn(1)O6 octahedra and edges with six equivalent Pb(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 50°. All Sn(1)-O(1) bond lengths are 2.10 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Pb(1) and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra.