Zr2Pb2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Zr sites. In the first Zr site, Zr(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing ZrO5 trigonal bipyramids. In the second Zr site, Zr(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing ZrO5 square pyramids. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(5) atoms. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Zr(1) and one Zr(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Zr(1), one Zr(2), and one Pb(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Zr(1), one Zr(2), and two equivalent Pb(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Zr(1), one Zr(2), and two equivalent Pb(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Zr(1), one Zr(2), and two equivalent Pb(1) atoms.
Zr2Pb2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Zr sites. In the first Zr site, Zr(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing ZrO5 trigonal bipyramids. The Zr(1)-O(1) bond length is 2.00 Å. The Zr(1)-O(2) bond length is 2.15 Å. The Zr(1)-O(3) bond length is 2.10 Å. The Zr(1)-O(4) bond length is 2.09 Å. The Zr(1)-O(5) bond length is 2.11 Å. In the second Zr site, Zr(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing ZrO5 square pyramids. The Zr(2)-O(1) bond length is 2.09 Å. The Zr(2)-O(2) bond length is 1.98 Å. The Zr(2)-O(3) bond length is 2.28 Å. The Zr(2)-O(4) bond length is 2.08 Å. The Zr(2)-O(5) bond length is 2.11 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(5) atoms. The Pb(1)-O(2) bond length is 2.76 Å. There is one shorter (2.51 Å) and one longer (2.58 Å) Pb(1)-O(5) bond length. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(4) atoms. There is one shorter (2.68 Å) and one longer (2.76 Å) Pb(2)-O(3) bond length. There is one shorter (2.56 Å) and one longer (2.71 Å) Pb(2)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Zr(1) and one Zr(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Zr(1), one Zr(2), and one Pb(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Zr(1), one Zr(2), and two equivalent Pb(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Zr(1), one Zr(2), and two equivalent Pb(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Zr(1), one Zr(2), and two equivalent Pb(1) atoms.