Zn5P5HO20 crystallizes in the monoclinic P2_1 space group. There are five inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.92 Å. The Zn(1)-O(2) bond length is 1.95 Å. The Zn(1)-O(3) bond length is 1.94 Å. The Zn(1)-O(4) bond length is 1.94 Å. In the second Zn site, Zn(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The Zn(2)-O(5) bond length is 1.95 Å. The Zn(2)-O(6) bond length is 1.94 Å. The Zn(2)-O(7) bond length is 1.91 Å. The Zn(2)-O(8) bond length is 1.94 Å. In the third Zn site, Zn(3) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The Zn(3)-O(10) bond length is 1.91 Å. The Zn(3)-O(11) bond length is 1.97 Å. The Zn(3)-O(12) bond length is 1.96 Å. The Zn(3)-O(9) bond length is 1.93 Å. In the fourth Zn site, Zn(4) is bonded to one O(13), one O(14), one O(15), and one O(16) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The Zn(4)-O(13) bond length is 1.93 Å. The Zn(4)-O(14) bond length is 1.95 Å. The Zn(4)-O(15) bond length is 1.93 Å. The Zn(4)-O(16) bond length is 1.94 Å. In the fifth Zn site, Zn(5) is bonded in a trigonal non-coplanar geometry to one O(17), one O(18), and one O(19) atom. The Zn(5)-O(17) bond length is 1.89 Å. The Zn(5)-O(18) bond length is 1.93 Å. The Zn(5)-O(19) bond length is 1.95 Å. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(13), one O(17), one O(2), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Zn(2)O4 tetrahedra, and  a cornercorner with one Zn(4)O4 tetrahedra. The P(1)-O(13) bond length is 1.54 Å. The P(1)-O(17) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(7) bond length is 1.52 Å. In the second P site, P(2) is bonded to one O(1), one O(10), one O(16), and one O(18) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Zn(3)O4 tetrahedra, and  a cornercorner with one Zn(4)O4 tetrahedra. The P(2)-O(1) bond length is 1.52 Å. The P(2)-O(10) bond length is 1.52 Å. The P(2)-O(16) bond length is 1.55 Å. The P(2)-O(18) bond length is 1.54 Å. In the third P site, P(3) is bonded to one O(14), one O(19), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one Zn(3)O4 tetrahedra, and  a cornercorner with one Zn(4)O4 tetrahedra. The P(3)-O(14) bond length is 1.53 Å. The P(3)-O(19) bond length is 1.54 Å. The P(3)-O(8) bond length is 1.53 Å. The P(3)-O(9) bond length is 1.54 Å. In the fourth P site, P(4) is bonded to one O(12), one O(15), one O(4), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one Zn(3)O4 tetrahedra, and  a cornercorner with one Zn(4)O4 tetrahedra. The P(4)-O(12) bond length is 1.54 Å. The P(4)-O(15) bond length is 1.54 Å. The P(4)-O(4) bond length is 1.50 Å. The P(4)-O(5) bond length is 1.52 Å. In the fifth P site, P(5) is bonded to one O(11), one O(20), one O(3), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Zn(2)O4 tetrahedra, and  a cornercorner with one Zn(3)O4 tetrahedra. The P(5)-O(11) bond length is 1.52 Å. The P(5)-O(20) bond length is 1.59 Å. The P(5)-O(3) bond length is 1.50 Å. The P(5)-O(6) bond length is 1.53 Å. H(1) is bonded in a single-bond geometry to one O(20) atom. The H(1)-O(20) bond length is 0.84 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(5) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Zn(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(5) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Zn(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one P(3) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Zn(3) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Zn(3) and one P(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Zn(3) and one P(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(3) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Zn(4) and one P(1) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Zn(4) and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Zn(4) and one P(4) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Zn(4) and one P(2) atom. In the seventeenth O site, O(17) is bonded in a bent 150 degrees geometry to one Zn(5) and one P(1) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Zn(5) and one P(2) atom. In the nineteenth O site, O(19) is bonded in a bent 120 degrees geometry to one Zn(5) and one P(3) atom. In the twentieth O site, O(20) is bonded in a water-like geometry to one P(5) and one H(1) atom. Linkers: 8 [O]P([O])([O])=O ,2 [O]P([O])(=O)O. Metal clusters: 10 [Zn]. The MOF has largest included sphere 4.62 A, density 2.05 g/cm3, surface area 2721.58 m2/g, accessible volume 0.26 cm3/g