Pb2Ir2O7 crystallizes in the cubic Fd-3m space group. Ir(1) is bonded to six equivalent O(1) atoms to form IrO6 octahedra that share corners with six equivalent Ir(1)O6 octahedra and edges with six equivalent Pb(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 49°. 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 Ir(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ir(1) and two equivalent Pb(1) atoms to form distorted OIr2Pb2 tetrahedra that share corners with two equivalent O(2)Pb4 tetrahedra, corners with twelve equivalent O(1)Ir2Pb2 tetrahedra,  an edgeedge with one O(2)Pb4 tetrahedra, and edges with four equivalent O(1)Ir2Pb2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Pb(1) atoms to form OPb4 tetrahedra that share corners with four equivalent O(2)Pb4 tetrahedra, corners with twelve equivalent O(1)Ir2Pb2 tetrahedra, and edges with six equivalent O(1)Ir2Pb2 tetrahedra.
Pb2Ir2O7 crystallizes in the cubic Fd-3m space group. Ir(1) is bonded to six equivalent O(1) atoms to form IrO6 octahedra that share corners with six equivalent Ir(1)O6 octahedra and edges with six equivalent Pb(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 49°. All Ir(1)-O(1) bond lengths are 2.00 Å. 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 Ir(1)O6 octahedra. Both Pb(1)-O(2) bond lengths are 2.23 Å. All Pb(1)-O(1) bond lengths are 2.52 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ir(1) and two equivalent Pb(1) atoms to form distorted OIr2Pb2 tetrahedra that share corners with two equivalent O(2)Pb4 tetrahedra, corners with twelve equivalent O(1)Ir2Pb2 tetrahedra,  an edgeedge with one O(2)Pb4 tetrahedra, and edges with four equivalent O(1)Ir2Pb2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Pb(1) atoms to form OPb4 tetrahedra that share corners with four equivalent O(2)Pb4 tetrahedra, corners with twelve equivalent O(1)Ir2Pb2 tetrahedra, and edges with six equivalent O(1)Ir2Pb2 tetrahedra.