Pb2Ta2O7 crystallizes in the cubic Fd-3m space group. The structure consists of one Pb2O framework and one TaO3 framework. In the Pb2O framework, Pb(1) is bonded in a distorted linear geometry to two equivalent O(1) atoms. O(1) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra. In the TaO3 framework, Ta(1) is bonded to six equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 37°. O(2) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms.
Pb2Ta2O7 crystallizes in the cubic Fd-3m space group. The structure consists of one Pb2O framework and one TaO3 framework. In the Pb2O framework, Pb(1) is bonded in a distorted linear geometry to two equivalent O(1) atoms. Both Pb(1)-O(1) bond lengths are 2.34 Å. O(1) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra. In the TaO3 framework, Ta(1) is bonded to six equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 37°. All Ta(1)-O(2) bond lengths are 2.02 Å. O(2) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms.