Hf2Pb4Sb2O13 crystallizes in the orthorhombic Imm2 space group. Hf(1) is bonded to one O(1), one O(4), two equivalent O(3), and two equivalent O(6) atoms to form HfO6 octahedra that share corners with two equivalent Hf(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra, edges with two equivalent Pb(1)O7 hexagonal pyramids, and edges with four equivalent Pb(2)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 43-47°. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(2), one O(5), one O(7), two equivalent O(3), and two equivalent O(6) atoms to form distorted PbO7 hexagonal pyramids that share  a cornercorner with one Pb(1)O7 hexagonal pyramid, corners with two equivalent Pb(2)O7 hexagonal pyramids,  an edgeedge with one Pb(1)O7 hexagonal pyramid, edges with two equivalent Pb(2)O7 hexagonal pyramids, edges with two equivalent Hf(1)O6 octahedra, and edges with four equivalent Sb(1)O6 octahedra. In the second Pb site, Pb(2) is bonded to one O(1), one O(4), one O(7), two equivalent O(3), and two equivalent O(6) atoms to form distorted PbO7 hexagonal pyramids that share  a cornercorner with one Pb(2)O7 hexagonal pyramid, corners with two equivalent Pb(1)O7 hexagonal pyramids,  an edgeedge with one Pb(2)O7 hexagonal pyramid, edges with two equivalent Pb(1)O7 hexagonal pyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Hf(1)O6 octahedra. Sb(1) is bonded to one O(2), one O(5), two equivalent O(3), and two equivalent O(6) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Hf(1)O6 octahedra, edges with two equivalent Pb(2)O7 hexagonal pyramids, and edges with four equivalent Pb(1)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 42-44°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Hf(1) and two equivalent Pb(2) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Pb(1) and two equivalent Sb(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Hf(1), one Pb(1), one Pb(2), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Hf(1) and two equivalent Pb(2) atoms. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to two equivalent Pb(1) and two equivalent Sb(1) atoms. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Hf(1), one Pb(1), one Pb(2), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a tetrahedral geometry to two equivalent Pb(1) and two equivalent Pb(2) atoms.
Hf2Pb4Sb2O13 crystallizes in the orthorhombic Imm2 space group. Hf(1) is bonded to one O(1), one O(4), two equivalent O(3), and two equivalent O(6) atoms to form HfO6 octahedra that share corners with two equivalent Hf(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra, edges with two equivalent Pb(1)O7 hexagonal pyramids, and edges with four equivalent Pb(2)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 43-47°. The Hf(1)-O(1) bond length is 2.08 Å. The Hf(1)-O(4) bond length is 2.06 Å. Both Hf(1)-O(3) bond lengths are 2.11 Å. Both Hf(1)-O(6) bond lengths are 2.09 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(2), one O(5), one O(7), two equivalent O(3), and two equivalent O(6) atoms to form distorted PbO7 hexagonal pyramids that share  a cornercorner with one Pb(1)O7 hexagonal pyramid, corners with two equivalent Pb(2)O7 hexagonal pyramids,  an edgeedge with one Pb(1)O7 hexagonal pyramid, edges with two equivalent Pb(2)O7 hexagonal pyramids, edges with two equivalent Hf(1)O6 octahedra, and edges with four equivalent Sb(1)O6 octahedra. The Pb(1)-O(2) bond length is 2.72 Å. The Pb(1)-O(5) bond length is 2.73 Å. The Pb(1)-O(7) bond length is 2.32 Å. Both Pb(1)-O(3) bond lengths are 2.68 Å. Both Pb(1)-O(6) bond lengths are 2.69 Å. In the second Pb site, Pb(2) is bonded to one O(1), one O(4), one O(7), two equivalent O(3), and two equivalent O(6) atoms to form distorted PbO7 hexagonal pyramids that share  a cornercorner with one Pb(2)O7 hexagonal pyramid, corners with two equivalent Pb(1)O7 hexagonal pyramids,  an edgeedge with one Pb(2)O7 hexagonal pyramid, edges with two equivalent Pb(1)O7 hexagonal pyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Hf(1)O6 octahedra. The Pb(2)-O(1) bond length is 2.65 Å. The Pb(2)-O(4) bond length is 2.69 Å. The Pb(2)-O(7) bond length is 2.34 Å. Both Pb(2)-O(3) bond lengths are 2.73 Å. Both Pb(2)-O(6) bond lengths are 2.75 Å. Sb(1) is bonded to one O(2), one O(5), two equivalent O(3), and two equivalent O(6) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Hf(1)O6 octahedra, edges with two equivalent Pb(2)O7 hexagonal pyramids, and edges with four equivalent Pb(1)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 42-44°. The Sb(1)-O(2) bond length is 2.05 Å. The Sb(1)-O(5) bond length is 2.03 Å. Both Sb(1)-O(3) bond lengths are 2.00 Å. Both Sb(1)-O(6) bond lengths are 1.99 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Hf(1) and two equivalent Pb(2) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Pb(1) and two equivalent Sb(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Hf(1), one Pb(1), one Pb(2), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Hf(1) and two equivalent Pb(2) atoms. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to two equivalent Pb(1) and two equivalent Sb(1) atoms. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Hf(1), one Pb(1), one Pb(2), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a tetrahedral geometry to two equivalent Pb(1) and two equivalent Pb(2) atoms.