Pb2Sb2O7 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 Sb(1)O6 octahedra. Sb(1) is bonded to six equivalent O(1) atoms to form SbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra and edges with six equivalent Pb(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 42°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Pb(1) and two equivalent Sb(1) atoms. In the second O site, O(2) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra.
Pb2Sb2O7 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 Sb(1)O6 octahedra. Both Pb(1)-O(2) bond lengths are 2.35 Å. All Pb(1)-O(1) bond lengths are 2.76 Å. Sb(1) is bonded to six equivalent O(1) atoms to form SbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra and edges with six equivalent Pb(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 42°. All Sb(1)-O(1) bond lengths are 2.05 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Pb(1) and two equivalent Sb(1) atoms. In the second O site, O(2) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra.