CdC5H7O7 crystallizes in the triclinic P-1 space group. Cd(1) is bonded to one O(2), one O(5), one O(6), one O(7), and two equivalent O(4) atoms to form distorted edge-sharing CdO6 octahedra. The Cd(1)-O(2) bond length is 2.32 Å. The Cd(1)-O(5) bond length is 2.28 Å. The Cd(1)-O(6) bond length is 2.38 Å. The Cd(1)-O(7) bond length is 2.40 Å. There is one shorter (2.34 Å) and one longer (2.41 Å) Cd(1)-O(4) bond length. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(3) bond length is 1.39 Å. The C(1)-C(5) bond length is 1.50 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(4) bond length is 1.50 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(2), and one H(1) atom. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(4)-O(1) bond length is 1.27 Å. The C(4)-O(2) bond length is 1.28 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(3), and one O(4) atom. The C(5)-O(3) bond length is 1.27 Å. The C(5)-O(4) bond length is 1.28 Å. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. The H(3)-O(5) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. The H(4)-O(6) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a distorted linear geometry to one O(3) and one O(6) atom. The H(5)-O(3) bond length is 1.64 Å. The H(5)-O(6) bond length is 1.01 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(7) atom. The H(6)-O(7) bond length is 0.98 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(7) atom. The H(7)-O(7) bond length is 0.98 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one C(4) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Cd(1) and one C(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one C(5) and one H(5) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(5) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one Cd(1), one H(2), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Cd(1), one H(4), and one H(5) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Cd(1), one H(6), and one H(7) atom. Linkers: 1 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 1 O.O.O.O.O.O.O=[C]O[Cd]O[C]=O.O=[C]O[Cd]O[C]=O. RCSR code: sql. The MOF has largest included sphere 1.57 A, density 2.65 g/cm3, surface area 2390.22 m2/g, accessible volume 0.05 cm3/g