CdC5HO8 crystallizes in the orthorhombic Ama2 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(5), and two equivalent O(8) atoms. Both Cd(1)-O(1) bond lengths are 2.22 Å. Both Cd(1)-O(4) bond lengths are 2.32 Å. Both Cd(1)-O(5) bond lengths are 2.43 Å. Both Cd(1)-O(8) bond lengths are 2.33 Å. In the second Cd site, Cd(2) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. Both Cd(2)-O(2) bond lengths are 2.19 Å. Both Cd(2)-O(3) bond lengths are 2.24 Å. Both Cd(2)-O(5) bond lengths are 2.36 Å. Both Cd(2)-O(6) bond lengths are 2.46 Å. Both Cd(2)-O(7) bond lengths are 2.38 Å. Both Cd(2)-O(8) bond lengths are 2.39 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(4) atom. The C(1)-C(1) bond length is 1.43 Å. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(4) bond length is 1.53 Å. In the second C site, C(2) is bonded in a single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.43 Å. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. The C(3)-C(3) bond length is 1.42 Å. The C(3)-C(5) bond length is 1.52 Å. In the fourth C site, C(4) is bonded in a 5-coordinate geometry to one C(1), one O(1), one O(2), one O(5), and one O(6) atom. The C(4)-O(1) bond length is 1.49 Å. The C(4)-O(2) bond length is 0.99 Å. The C(4)-O(5) bond length is 1.16 Å. The C(4)-O(6) bond length is 1.37 Å. In the fifth C site, C(5) is bonded in a 5-coordinate geometry to one C(3), one O(3), one O(4), one O(7), and one O(8) atom. The C(5)-O(3) bond length is 1.10 Å. The C(5)-O(4) bond length is 1.47 Å. The C(5)-O(7) bond length is 1.33 Å. The C(5)-O(8) bond length is 1.19 Å. H(1) is bonded in a single-bond geometry to one C(2) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1) and one C(4) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Cd(2), one C(4), and one O(6) atom. The O(2)-O(6) bond length is 1.11 Å. In the third O site, O(3) is bonded in a single-bond geometry to one Cd(2) and one C(5) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cd(1) and one C(5) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Cd(1), one Cd(2), and one C(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cd(2), one C(4), and one O(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Cd(2) and one C(5) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Cd(1), one Cd(2), and one C(5) atom. Linkers: 4 O1OC12OO2.O1OC12OO2.[O]C1([O])OO1.[O]C1([O])OO1.[c]1[c]c[c][c]c1. Metal clusters: 8 [Cd]. The MOF has largest included sphere 5.28 A, density 1.90 g/cm3, surface area 2013.40 m2/g, accessible volume 0.27 cm3/g