Zn3C10P4H12(N2O7)2 crystallizes in the trigonal P3_221 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one N(2), one O(2), one O(3), and one O(7) atom to form ZnNO3 tetrahedra that share  a cornercorner with one P(2)CO3 tetrahedra and corners with two equivalent P(1)CO3 tetrahedra. The Zn(1)-N(2) bond length is 1.99 Å. The Zn(1)-O(2) bond length is 1.95 Å. The Zn(1)-O(3) bond length is 1.93 Å. The Zn(1)-O(7) bond length is 1.95 Å. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form ZnO4 tetrahedra that share corners with two equivalent P(1)CO3 tetrahedra and corners with two equivalent P(2)CO3 tetrahedra. Both Zn(2)-O(1) bond lengths are 1.94 Å. Both Zn(2)-O(5) bond lengths are 1.92 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted tetrahedral geometry to one C(2), one P(1), one P(2), and one O(6) atom. The C(1)-C(2) bond length is 1.52 Å. The C(1)-P(1) bond length is 1.87 Å. The C(1)-P(2) bond length is 1.85 Å. The C(1)-O(6) bond length is 1.44 Å. In the second C site, C(2) is bonded in a 3-coordinate geometry to one C(1); one N(1); and two equivalent H(2,3) atoms. The C(2)-N(1) bond length is 1.45 Å. Both C(2)-H(2,3) bond lengths are 0.97 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(4) atom. The C(3)-N(1) bond length is 1.34 Å. The C(3)-N(2) bond length is 1.31 Å. The C(3)-H(4) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(5), one N(1), and one H(5) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-N(1) bond length is 1.34 Å. The C(4)-H(5) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(2), and one H(6) atom. The C(5)-N(2) bond length is 1.39 Å. The C(5)-H(6) bond length is 0.93 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(1), one O(2), and one O(7) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one P(2)CO3 tetrahedra, and corners with two equivalent Zn(1)NO3 tetrahedra. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.51 Å. The P(1)-O(7) bond length is 1.50 Å. In the second P site, P(2) is bonded to one C(1), one O(3), one O(4), and one O(5) atom to form PCO3 tetrahedra that share  a cornercorner with one Zn(1)NO3 tetrahedra,  a cornercorner with one Zn(2)O4 tetrahedra, and  a cornercorner with one P(1)CO3 tetrahedra. The P(2)-O(3) bond length is 1.53 Å. The P(2)-O(4) bond length is 1.48 Å. The P(2)-O(5) bond length is 1.52 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Zn(1), one C(3), and one C(5) atom. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(6) atom. The H(1)-O(6) bond length is 0.82 Å. In the second H site, H(2,3) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(5) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(1) atom. In the second O site, O(2) is bonded in a distorted 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(2) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one C(1) and one H(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. Linkers: 6 [O]P([O])(=O)C(O)(Cn1ccnc1)P([O])([O])=O. Metal clusters: 9 [Zn]. The MOF has largest included sphere 6.07 A, density 1.42 g/cm3, surface area 3348.62 m2/g, accessible volume 0.39 cm3/g