Zn2(HPO4)3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.92 Å. The Zn(1)-O(2) bond length is 1.94 Å. The Zn(1)-O(7) bond length is 1.97 Å. The Zn(1)-O(8) bond length is 1.96 Å. In the second Zn site, Zn(2) is bonded to one O(10), one O(11), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with three equivalent P(3)O4 tetrahedra. The Zn(2)-O(10) bond length is 1.94 Å. The Zn(2)-O(11) bond length is 1.95 Å. The Zn(2)-O(3) bond length is 1.97 Å. The Zn(2)-O(4) bond length is 1.92 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra and  a cornercorner with one Zn(2)O4 tetrahedra. The P(1)-O(1) bond length is 1.50 Å. The P(1)-O(3) bond length is 1.51 Å. The P(1)-O(5) bond length is 1.54 Å. The P(1)-O(6) bond length is 1.57 Å. In the second P site, P(2) is bonded to one O(2), one O(7), one O(8), and one O(9) atom to form PO4 tetrahedra that share corners with three equivalent Zn(1)O4 tetrahedra. The P(2)-O(2) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.53 Å. The P(2)-O(8) bond length is 1.54 Å. The P(2)-O(9) bond length is 1.54 Å. In the third P site, P(3) is bonded to one O(10), one O(11), one O(12), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Zn(2)O4 tetrahedra. The P(3)-O(10) bond length is 1.53 Å. The P(3)-O(11) bond length is 1.52 Å. The P(3)-O(12) bond length is 1.58 Å. The P(3)-O(4) bond length is 1.51 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(5) and one O(9) atom. The H(1)-O(5) bond length is 1.46 Å. The H(1)-O(9) bond length is 1.01 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 0.75 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(12) atom. The H(3)-O(12) bond length is 0.70 Å. There are twelve 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(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Zn(2) and one P(3) 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 bent 120 degrees geometry to one P(1) and one H(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one P(2) and one H(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(3) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one P(3) and one H(3) atom. Linkers: 12 [O]P([O])(=O)O. Metal clusters: 8 [Zn]. The MOF has largest included sphere 4.42 A, density 1.94 g/cm3, surface area 3127.63 m2/g, accessible volume 0.23 cm3/g