Cr3C24O13 crystallizes in the hexagonal P6_3/mmc space group. Cr(1) is bonded in a distorted single-bond geometry to one O(2) and four equivalent O(1) atoms. The Cr(1)-O(2) bond length is 1.85 Å. All Cr(1)-O(1) bond lengths are 2.00 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(1) and one C(3) atom. The C(1)-C(1) bond length is 1.44 Å. The C(1)-C(3) bond length is 1.39 Å. In the second C site, C(2) is bonded in a bent 120 degrees geometry to one C(3) and two equivalent O(1) atoms. The C(2)-C(3) bond length is 1.43 Å. Both C(2)-O(1) bond lengths are 1.27 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2) and two equivalent C(1) atoms. There are two inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to three equivalent Cr(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Cr(1) and one C(2) atom. Linkers: 6 [O]C(=O)c1[c][c]c(C([O])=O)[c][c]1. Metal clusters: 2 [C]1O[Cr]23O[C]O[Cr]45(O1)O[C]O[Cr](O[C]O2)(O[C]O3)(O[C]O4)O5. RCSR code: acs. The MOF has largest included sphere 10.58 A, density 0.64 g/cm3, surface area 3729.19 m2/g, accessible volume 1.18 cm3/g