ZnGeP3(HO4)3 crystallizes in the triclinic P-1 space group. Zn(1) is bonded to one O(1), one O(5), one O(7), and one O(9) atom to form ZnO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.99 Å. The Zn(1)-O(5) bond length is 1.93 Å. The Zn(1)-O(7) bond length is 1.90 Å. The Zn(1)-O(9) bond length is 1.94 Å. Ge(1) is bonded to one O(11), one O(12), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Ge(1)-O(11) bond length is 1.96 Å. The Ge(1)-O(12) bond length is 1.97 Å. The Ge(1)-O(3) bond length is 1.93 Å. The Ge(1)-O(6) bond length is 1.91 Å. There are three 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(4) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra and  a cornercorner with one Ge(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.60 Å. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. The P(2)-O(5) bond length is 1.52 Å. The P(2)-O(6) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.54 Å. The P(2)-O(8) bond length is 1.59 Å. In the third P site, P(3) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. The P(3)-O(10) bond length is 1.59 Å. The P(3)-O(11) bond length is 1.53 Å. The P(3)-O(12) bond length is 1.54 Å. The P(3)-O(9) bond length is 1.50 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(8) atom. The H(1)-O(8) bond length is 1.02 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(10) atom. The H(2)-O(10) bond length is 0.95 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.95 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 linear geometry to one P(1) and one H(3) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one P(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 P(2) and one H(1) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(3) atom. In the tenth O site, O(10) is bonded in a linear geometry to one P(3) and one H(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ge(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ge(1) and one P(3) atom. Linkers: 3 [O]P(=O)(O)O[Ge]1(OP([O])(=O)O)O[P@](=O)(O)O[Ge](OP([O])(=O)O)(OP([O])(=O)O)O[P@@](=O)(O)O1. Metal clusters: 1 [O]P(O)O[Zn@]1(O[P]O)OP(O)O[Zn@@](O[P]O)(OP([O])O)OP(O)O1. RCSR code: pcu. The MOF has largest included sphere 5.01 A, density 1.80 g/cm3, surface area 2813.37 m2/g, accessible volume 0.25 cm3/g