Co2C7HO6CH crystallizes in the trigonal R3m space group. The structure consists of nine 02329_fluka molecules inside a Co2C7HO6 framework. In the Co2C7HO6 framework, Co(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing CoO5 square pyramids. The Co(1)-O(3) bond length is 2.00 Å. There is one shorter (2.03 Å) and one longer (2.07 Å) Co(1)-O(1) bond length. There is one shorter (1.97 Å) and one longer (2.02 Å) Co(1)-O(2) bond length. There are four inequivalent C sites. In the first C site, C(1) is bonded in a single-bond geometry to one C(3) and one O(1) atom. The C(1)-C(3) bond length is 1.44 Å. The C(1)-O(1) bond length is 1.34 Å. In the second C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(4), and one C(5) atom. The C(3)-C(4) bond length is 1.46 Å. The C(3)-C(5) bond length is 1.39 Å. In the third C site, C(4) is bonded in a bent 120 degrees geometry to one C(3), one O(2), and one O(3) atom. The C(4)-O(2) bond length is 1.30 Å. The C(4)-O(3) bond length is 1.27 Å. In the fourth C site, C(5) is bonded in a distorted trigonal planar geometry to two equivalent C(3) and one H(2) atom. The C(5)-H(2) bond length is 1.09 Å. H(2) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Co(1) and one C(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one C(4) atom. Linkers: 3 [O]C(=O)c1cc(C([O])=O)c([O])cc1[O]. Metal clusters: 6 [Co]. The MOF has largest included sphere 11.00 A, density 1.20 g/cm3, surface area 2471.12 m2/g, accessible volume 0.53 cm3/g