Pb2Sb2O7 crystallizes in the orthorhombic Ima2 space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. In the second Sb site, Sb(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Pb(1), one Pb(2), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Pb(2), two equivalent Pb(1), and one Sb(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Pb(2), one Sb(1), and one Sb(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Sb(1) atoms.
Pb2Sb2O7 crystallizes in the orthorhombic Ima2 space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both Pb(1)-O(1) bond lengths are 2.61 Å. There are two shorter (2.41 Å) and two longer (2.70 Å) Pb(1)-O(2) bond lengths. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Pb(2)-O(1) bond lengths are 2.73 Å. Both Pb(2)-O(2) bond lengths are 2.44 Å. Both Pb(2)-O(3) bond lengths are 2.55 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. Both Sb(1)-O(1) bond lengths are 2.00 Å. Both Sb(1)-O(3) bond lengths are 1.98 Å. Both Sb(1)-O(4) bond lengths are 2.01 Å. In the second Sb site, Sb(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. Both Sb(2)-O(1) bond lengths are 2.04 Å. Both Sb(2)-O(2) bond lengths are 1.93 Å. Both Sb(2)-O(3) bond lengths are 2.02 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Pb(1), one Pb(2), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Pb(2), two equivalent Pb(1), and one Sb(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Pb(2), one Sb(1), and one Sb(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Sb(1) atoms.