Ce3O4(C3O2)3 crystallizes in the cubic Fd-3m space group. The structure is zero-dimensional and consists of thirty-two trimesic acid molecules and thirty-two Ce3O4 clusters. In each Ce3O4 cluster, Ce(1) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(2) atoms. The Ce(1)-O(3) bond length is 2.33 Å. Both Ce(1)-O(2) bond lengths are 2.46 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a water-like geometry to two equivalent Ce(1) atoms. In the second O site, O(3) is bonded in a trigonal non-coplanar geometry to three equivalent Ce(1) atoms. Linkers: 32 [O]C(=O)c1[c]c(C([O])=O)[c]c(C([O])=O)[c]1. Metal clusters: 16 [C]1O[Ce]23O[C]O[Ce]45(O[C]O[Ce](O1)(O2)(O4)O5)O3.[C]1O[Ce]23O[C]O[Ce]45(O[C]O[Ce](O1)(O2)(O4)O5)O3. RCSR code: spn. The MOF has largest included sphere 21.14 A, density 0.76 g/cm3, surface area 1904.77 m2/g, accessible volume 1.11 cm3/g