Zn2P3(HO3)4 crystallizes in the monoclinic C2/c space group. 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(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.91 Å. The Zn(1)-O(2) bond length is 1.93 Å. The Zn(1)-O(3) bond length is 1.97 Å. The Zn(1)-O(4) bond length is 1.97 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share corners with three equivalent Zn(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.50 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.53 Å. The P(1)-O(5) bond length is 1.59 Å. In the second P site, P(2) is bonded to two equivalent O(4) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. Both P(2)-O(4) bond lengths are 1.53 Å. Both P(2)-O(6) bond lengths are 1.56 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.82 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.82 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Zn(1) and one P(1) 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 120 degrees geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one P(1) and one H(1) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one P(2) and one H(2) atom. Linkers: 4 [O]P(=O)(O)O ,8 [O]P([O])(=O)O. Metal clusters: 8 [Zn]. The MOF has largest included sphere 4.26 A, density 1.77 g/cm3, surface area 3191.34 m2/g, accessible volume 0.32 cm3/g