Cr3C24O13 crystallizes in the hexagonal P-62c space group. Cr(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing CrO5 square pyramids. The Cr(1)-O(3) bond length is 1.97 Å. Both Cr(1)-O(1) bond lengths are 2.04 Å. Both Cr(1)-O(2) bond lengths are 1.92 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.45 Å. The C(1)-O(1) bond length is 1.32 Å. The C(1)-O(2) bond length is 1.27 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 1.42 Å. The C(2)-C(4) bond length is 1.37 Å. In the third C site, C(3) is bonded in a bent 120 degrees geometry to one C(2) and one C(3) atom. The C(3)-C(3) bond length is 1.38 Å. In the fourth C site, C(4) is bonded in a bent 120 degrees geometry to one C(2) and one C(4) atom. The C(4)-C(4) bond length is 1.40 Å. There are three inequivalent O sites. In the first O site, O(3) is bonded in a trigonal planar geometry to three equivalent Cr(1) atoms. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Cr(1) and one C(1) atom. In the third O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one C(1) 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 5.69 A, density 1.08 g/cm3, surface area 3760.14 m2/g, accessible volume 0.52 cm3/g