CdC7P2NH9O7 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one O(1), one O(4), one O(5), and two equivalent O(3) atoms to form distorted CdO5 trigonal bipyramids that share corners with two equivalent P(2)CO3 tetrahedra, corners with three equivalent P(1)CO3 tetrahedra, and  an edgeedge with one Cd(1)O5 trigonal bipyramid. The Cd(1)-O(1) bond length is 2.18 Å. The Cd(1)-O(4) bond length is 2.31 Å. The Cd(1)-O(5) bond length is 2.21 Å. There is one shorter (2.26 Å) and one longer (2.39 Å) Cd(1)-O(3) bond length. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(5), and one C(6) atom. The C(1)-C(2) bond length is 1.41 Å. The C(1)-C(5) bond length is 1.40 Å. The C(1)-C(6) bond length is 1.50 Å. In the second 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(3) bond length is 1.38 Å. The C(2)-H(4) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(5) atom. The C(3)-N(1) bond length is 1.34 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 1.38 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 distorted single-bond geometry to one C(1), one C(4), and one H(7) atom. The C(5)-H(7) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted water-like geometry to one C(1), one C(7), one H(8), and one H(9) atom. The C(6)-C(7) bond length is 1.55 Å. The C(6)-H(8) bond length is 1.10 Å. The C(6)-H(9) bond length is 1.10 Å. In the seventh C site, C(7) is bonded in a distorted tetrahedral geometry to one C(6), one P(1), one P(2), and one O(7) atom. The C(7)-P(1) bond length is 1.87 Å. The C(7)-P(2) bond length is 1.87 Å. The C(7)-O(7) bond length is 1.45 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one C(7), one O(1), one O(2), and one O(3) atom to form distorted PCO3 tetrahedra that share  a cornercorner with one P(2)CO3 tetrahedra and corners with three equivalent Cd(1)O5 trigonal bipyramids. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.55 Å. In the second P site, P(2) is bonded to one C(7), one O(4), one O(5), and one O(6) atom to form PCO3 tetrahedra that share  a cornercorner with one P(1)CO3 tetrahedra and corners with two equivalent Cd(1)O5 trigonal bipyramids. The P(2)-O(4) bond length is 1.54 Å. The P(2)-O(5) bond length is 1.52 Å. The P(2)-O(6) bond length is 1.56 Å. N(1) is bonded in a trigonal planar geometry to one C(3), one C(4), and one H(1) atom. The N(1)-H(1) bond length is 1.07 Å. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one N(1) and one O(4) atom. The H(1)-O(4) bond length is 1.57 Å. In the second H site, H(2) is bonded in a linear geometry to one O(2) and one O(6) atom. The H(2)-O(2) bond length is 1.40 Å. The H(2)-O(6) bond length is 1.07 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. The H(3)-O(7) bond length is 0.99 Å. 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(5) 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 C(6) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one H(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Cd(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cd(1), one P(2), and one H(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cd(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one H(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one C(7) and one H(3) atom. Linkers: 4 [O]P([O])(=O)C(O)(CC1=C[CH]NC=C1)P([O])(=O)O. Metal clusters: 4 [Cd]. The MOF has largest included sphere 2.18 A, density 2.32 g/cm3, surface area 2872.49 m2/g, accessible volume 0.08 cm3/g