Pb2Sb2O7 crystallizes in the cubic Fd-3m space group. Pb(1) is bonded in a hexagonal planar geometry to six equivalent O(1) atoms. Sb(1) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pb(1) and two equivalent Sb(1) atoms to form OSb2Pb2 tetrahedra that share corners with two equivalent O(2)Sb4 tetrahedra, corners with twelve equivalent O(1)Sb2Pb2 tetrahedra,  an edgeedge with one O(2)Sb4 tetrahedra, and edges with four equivalent O(1)Sb2Pb2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Sb(1) atoms to form OSb4 tetrahedra that share corners with four equivalent O(2)Sb4 tetrahedra, corners with twelve equivalent O(1)Sb2Pb2 tetrahedra, and edges with six equivalent O(1)Sb2Pb2 tetrahedra.
Pb2Sb2O7 crystallizes in the cubic Fd-3m space group. Pb(1) is bonded in a hexagonal planar geometry to six equivalent O(1) atoms. All Pb(1)-O(1) bond lengths are 2.50 Å. Sb(1) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. Both Sb(1)-O(2) bond lengths are 2.33 Å. All Sb(1)-O(1) bond lengths are 2.17 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pb(1) and two equivalent Sb(1) atoms to form OSb2Pb2 tetrahedra that share corners with two equivalent O(2)Sb4 tetrahedra, corners with twelve equivalent O(1)Sb2Pb2 tetrahedra,  an edgeedge with one O(2)Sb4 tetrahedra, and edges with four equivalent O(1)Sb2Pb2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Sb(1) atoms to form OSb4 tetrahedra that share corners with four equivalent O(2)Sb4 tetrahedra, corners with twelve equivalent O(1)Sb2Pb2 tetrahedra, and edges with six equivalent O(1)Sb2Pb2 tetrahedra.