Co8In3(C3O2)18 crystallizes in the cubic Ia-3d space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a single-bond geometry to one Co(2) atom. The Co(1)-Co(2) bond length is 0.84 Å. In the second Co site, Co(2) is bonded in a tetrahedral geometry to one Co(1) and three equivalent O(3) atoms. All Co(2)-O(3) bond lengths are 1.90 Å. In(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. All In(1)-O(1) bond lengths are 2.21 Å. All In(1)-O(2) bond lengths are 2.35 Å. There are six inequivalent C sites. In the first 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(1) bond length is 1.48 Å. The C(2)-C(3) bond length is 1.36 Å. The C(2)-C(4) bond length is 1.44 Å. In the second C site, C(4) is bonded in a bent 120 degrees geometry to two equivalent C(2) atoms. In the third C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(6) and two equivalent O(3) atoms. The C(5)-C(6) bond length is 1.56 Å. Both C(5)-O(3) bond lengths are 1.24 Å. In the fourth C site, C(6) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(3) atoms. Both C(6)-C(3) bond lengths are 1.40 Å. In the fifth C site, C(3) is bonded in a bent 120 degrees geometry to one C(2) and one C(6) atom. In the sixth C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.25 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in an L-shaped geometry to one In(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to one In(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(2) and one C(5) atom. Linkers: 48 [O]C(=O)c1[c]c(C([O])=O)[c]c(C([O])=O)[c]1. Metal clusters: 24 O=[C]O[In](O[C]=O)O[C]=O.[O][C]=O ,16 [Co][Co@]12O[C]O[Co@]([Co])(O[C]O1)O[C]O2. RCSR code: iac-d. The MOF has largest included sphere 6.58 A, density 0.94 g/cm3, surface area 3049.09 m2/g, accessible volume 0.64 cm3/g