CdC2PNH10O5Cl crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent Cl(1) atoms to form distorted CdCl2O4 octahedra that share corners with two equivalent P(1)CO3 tetrahedra and  an edgeedge with one Cd(1)Cl2O4 octahedra. The Cd(1)-O(2) bond length is 2.24 Å. The Cd(1)-O(3) bond length is 2.30 Å. The Cd(1)-O(4) bond length is 2.40 Å. The Cd(1)-O(5) bond length is 2.23 Å. There is one shorter (2.70 Å) and one longer (2.77 Å) Cd(1)-Cl(1) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted tetrahedral geometry to one P(1), one N(1), one H(7), and one H(8) atom. The C(1)-P(1) bond length is 1.83 Å. The C(1)-N(1) bond length is 1.49 Å. The C(1)-H(7) bond length is 1.10 Å. The C(1)-H(8) bond length is 1.10 Å. In the second C site, C(2) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(10), and one H(9) atom. The C(2)-N(1) bond length is 1.49 Å. The C(2)-H(10) bond length is 1.10 Å. The C(2)-H(9) bond length is 1.10 Å. P(1) is bonded to one C(1), one O(1), one O(2), and one O(5) atom to form PCO3 tetrahedra that share corners with two equivalent Cd(1)Cl2O4 octahedra and  a cornercorner with one N(1)H2C2 tetrahedra. The corner-sharing octahedral tilt angles range from 45-48°. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(5) bond length is 1.53 Å. N(1) is bonded to one C(1), one C(2), one H(1), and one H(2) atom to form NH2C2 tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra. The N(1)-H(1) bond length is 1.04 Å. The N(1)-H(2) bond length is 1.06 Å. There are ten inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) and one O(2) atom. The H(2)-O(2) bond length is 1.77 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(4) and one Cl(1) atom. The H(3)-O(4) bond length is 0.99 Å. The H(3)-Cl(1) bond length is 2.15 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(4) atom. The H(4)-O(1) bond length is 1.55 Å. The H(4)-O(4) bond length is 1.03 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(3) atom. The H(5)-O(3) bond length is 1.00 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(3) atom. The H(6)-O(3) bond length is 1.00 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(1) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(1) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(2) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(2) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(1) and one H(4) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Cd(1), one P(1), and one H(2) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Cd(1), one H(5), and one H(6) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Cd(1), one H(3), and one H(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cd(1) and one P(1) atom. Cl(1) is bonded in a 3-coordinate geometry to two equivalent Cd(1) and one H(3) atom. Linkers: 2 [O]P(=O)(C[NH2]CC[NH2]CP(=O)([O])[O])[O]. Metal clusters: 4 [Cd]. The MOF has largest included sphere 1.51 A, density 2.59 g/cm3, surface area 2881.66 m2/g, accessible volume 0.08 cm3/g