ZnC3PNH5O3 crystallizes in the orthorhombic Pbca space group. Zn(1) is bonded to one N(1), one O(1), one O(2), and one O(3) atom to form ZnNO3 tetrahedra that share corners with three equivalent P(1)HO3 tetrahedra. The Zn(1)-N(1) bond length is 2.05 Å. The Zn(1)-O(1) bond length is 1.94 Å. The Zn(1)-O(2) bond length is 1.96 Å. The Zn(1)-O(3) bond length is 1.98 Å. There are three inequivalent C sites. In the first C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(4) atom. The C(2)-C(1) bond length is 1.40 Å. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(4) bond length is 1.09 Å. In the second C site, C(3) is bonded in a distorted trigonal planar geometry to one C(1), one C(2), and one H(5) atom. The C(3)-C(1) bond length is 1.40 Å. The C(3)-H(5) bond length is 1.09 Å. In the third C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(3), and one N(1) atom. The C(1)-N(1) bond length is 1.43 Å. P(1) is bonded to one H(1), one O(1), one O(2), and one O(3) atom to form distorted PHO3 tetrahedra that share corners with three equivalent Zn(1)NO3 tetrahedra. The P(1)-H(1) bond length is 1.41 Å. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.55 Å. N(1) is bonded in a distorted tetrahedral geometry to one Zn(1), one C(1), one H(2), and one H(3) atom. The N(1)-H(2) bond length is 1.04 Å. The N(1)-H(3) bond length is 1.04 Å. There are five inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(4) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(3) atom. In the fifth H site, H(2) is bonded in a single-bond geometry to one N(1) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the second O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(1) atom. Linkers: 4 Nc1ccc(N)cc1. Metal clusters: 8 [Zn]. The MOF has largest included sphere 2.05 A, density 2.18 g/cm3, surface area 3396.83 m2/g, accessible volume 0.11 cm3/g