CdH12(C7O3)2 crystallizes in the orthorhombic Pnma space group. Cd(1) is bonded to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted corner-sharing CdO7 pentagonal bipyramids. The Cd(1)-O(4) bond length is 2.25 Å. Both Cd(1)-O(1) bond lengths are 2.55 Å. Both Cd(1)-O(2) bond lengths are 2.41 Å. There is one shorter (2.33 Å) and one longer (2.40 Å) Cd(1)-O(3) bond length. There are seven inequivalent C sites. In the first C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(3) atom. The C(3)-C(2) bond length is 1.40 Å. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(3) bond length is 1.09 Å. In the second C site, C(7) is bonded in a distorted single-bond geometry to one C(2) and one H(6) atom. The C(7)-C(2) bond length is 1.40 Å. The C(7)-H(6) bond length is 1.09 Å. In the third C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(1) bond length is 1.49 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-H(4) bond length is 1.09 Å. In the fifth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(5) atom. The C(6)-C(5) bond length is 1.41 Å. The C(6)-H(5) bond length is 1.09 Å. In the sixth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-O(1) bond length is 1.30 Å. The C(1)-O(2) bond length is 1.27 Å. In the seventh C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(5), and one C(6) atom. The C(5)-C(5) bond length is 1.49 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(3) atom. The H(1)-O(1) bond length is 1.67 Å. The H(1)-O(3) bond length is 1.01 Å. In the second H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(2) is bonded in a single-bond geometry to one O(1) and one O(4) atom. The H(2)-O(1) bond length is 1.75 Å. The H(2)-O(4) bond length is 0.99 Å. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the sixth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted water-like geometry to one Cd(1) and two equivalent H(2) atoms. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Cd(1), one C(1), one H(1), and one H(2) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to two equivalent Cd(1) and two equivalent H(1) atoms. In the fourth O site, O(2) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(1) atom. Linkers: 4 [O]C(=O)c1ccc(-c2ccc(C([O])=O)cc2)cc1 ,4 [O][C]c1[c]cc(-c2ccc(C([O])=O)cc2)cc1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 1.62 A, density 2.01 g/cm3, surface area 3805.02 m2/g, accessible volume 0.10 cm3/g