ZnC3PNH5O3 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 N(1), one N(2), one O(3), and one O(4) atom to form ZnN2O2 tetrahedra that share  a cornercorner with one P(1)HO3 tetrahedra and  a cornercorner with one P(2)HO3 tetrahedra. The Zn(1)-N(1) bond length is 2.00 Å. The Zn(1)-N(2) bond length is 2.03 Å. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(4) bond length is 1.95 Å. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form ZnO4 tetrahedra that share corners with two equivalent P(1)HO3 tetrahedra and corners with two equivalent P(2)HO3 tetrahedra. The Zn(2)-O(1) bond length is 1.95 Å. The Zn(2)-O(2) bond length is 1.98 Å. The Zn(2)-O(5) bond length is 1.95 Å. The Zn(2)-O(6) bond length is 1.95 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(3) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(3) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(4) atom. The C(2)-H(4) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(5) and one H(5) atom. The C(3)-C(5) bond length is 1.40 Å. The C(3)-H(5) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5), one N(1), and one H(6) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-N(1) bond length is 1.35 Å. The C(4)-H(6) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(3), one C(4), and one C(6) atom. The C(5)-C(6) bond length is 1.51 Å. In the sixth C site, C(6) is bonded in a distorted trigonal non-coplanar geometry to one C(5), one N(2), one H(7), and one H(8) atom. The C(6)-N(2) bond length is 1.49 Å. The C(6)-H(7) bond length is 1.09 Å. The C(6)-H(8) bond length is 1.10 Å. There are two inequivalent P sites. In the first P site, 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  a cornercorner with one Zn(1)N2O2 tetrahedra and corners with two equivalent Zn(2)O4 tetrahedra. The P(1)-H(1) bond length is 1.41 Å. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.53 Å. In the second P site, P(2) is bonded to one H(2), one O(4), one O(5), and one O(6) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one Zn(1)N2O2 tetrahedra and corners with two equivalent Zn(2)O4 tetrahedra. The P(2)-H(2) bond length is 1.41 Å. The P(2)-O(4) bond length is 1.54 Å. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.53 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a distorted tetrahedral geometry to one Zn(1), one C(6), one H(10), and one H(9) atom. The N(2)-H(10) bond length is 1.04 Å. The N(2)-H(9) bond length is 1.03 Å. There are ten inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(3) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(4) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(6) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(6) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one N(2) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one N(2) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(2) 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 distorted bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one P(2) atom. Linkers: 4 NCc1cccnc1. Metal clusters: 8 [Zn]. The MOF has largest included sphere 1.68 A, density 2.31 g/cm3, surface area 3408.07 m2/g, accessible volume 0.12 cm3/g