CdC4H10O9 crystallizes in the monoclinic P2_1 space group. Cd(1) is bonded in a distorted pentagonal bipyramidal geometry to one O(1), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. The Cd(1)-O(1) bond length is 2.32 Å. The Cd(1)-O(3) bond length is 2.50 Å. The Cd(1)-O(4) bond length is 2.40 Å. The Cd(1)-O(5) bond length is 2.40 Å. The Cd(1)-O(7) bond length is 2.57 Å. The Cd(1)-O(8) bond length is 2.30 Å. The Cd(1)-O(9) bond length is 2.32 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted water-like geometry to one H(9) and one O(3) atom. The C(2)-H(9) bond length is 1.10 Å. The C(2)-O(3) bond length is 1.43 Å. In the third C site, C(3) is bonded in a distorted water-like geometry to one H(10) and one O(4) atom. The C(3)-H(10) bond length is 1.10 Å. The C(3)-O(4) bond length is 1.41 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(4)-O(5) bond length is 1.27 Å. The C(4)-O(6) bond length is 1.27 Å. There are ten inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) atom. The H(1)-O(3) bond length is 1.00 Å. In the second H site, H(2) is bonded in a linear geometry to one O(2) and one O(4) atom. The H(2)-O(2) bond length is 1.53 Å. The H(2)-O(4) bond length is 1.03 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 0.98 Å. In the fourth H site, H(4) is bonded in a distorted single-bond geometry to one O(6) and one O(7) atom. The H(4)-O(6) bond length is 1.63 Å. The H(4)-O(7) bond length is 1.02 Å. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(7) and one O(8) atom. The H(5)-O(7) bond length is 1.63 Å. The H(5)-O(8) bond length is 1.00 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(8) atom. The H(6)-O(8) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(9) atom. The H(7)-O(9) bond length is 1.00 Å. In the eighth H site, H(8) is bonded in a distorted single-bond geometry to one O(1) and one O(9) atom. The H(8)-O(1) bond length is 1.67 Å. The H(8)-O(9) bond length is 1.01 Å. 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(3) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one H(8) atom. In the second O site, O(2) is bonded in a water-like geometry to one C(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 C(2), and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Cd(1), one C(3), and one H(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Cd(1) and one C(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one C(4) and one H(4) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Cd(1), one H(3), one H(4), and one H(5) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Cd(1), one H(5), and one H(6) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Cd(1), one H(7), and one H(8) atom. Linkers: 2 [O]C(=O)[C@H](O)[C@@H](O)C([O])=O. Metal clusters: 2 [Cd]. The MOF has largest included sphere 1.55 A, density 2.49 g/cm3, surface area 2874.82 m2/g, accessible volume 0.07 cm3/g