UC7H3O6CH crystallizes in the monoclinic C2/c space group. The structure consists of four 02329_fluka molecules inside a UC7H3O6 framework. In the UC7H3O6 framework, U(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both U(1)-O(1) bond lengths are 1.81 Å. Both U(1)-O(2) bond lengths are 2.33 Å. Both U(1)-O(3) bond lengths are 2.29 Å. There are four inequivalent C sites. In the first C site, C(5) is bonded in a distorted single-bond geometry to one C(3) and one H(3) atom. The C(5)-C(3) bond length is 1.40 Å. The C(5)-H(3) bond length is 1.09 Å. In the second C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(2), and one O(3) atom. The C(1)-C(3) bond length is 1.48 Å. The C(1)-O(2) bond length is 1.27 Å. The C(1)-O(3) bond length is 1.28 Å. In the third C site, C(2) is bonded in a distorted single-bond geometry to two equivalent C(3) and one H(1) atom. Both C(2)-C(3) bond lengths are 1.40 Å. The C(2)-H(1) bond length is 1.09 Å. In the fourth C site, C(3) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(5) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 150 degrees geometry to one U(1) and one C(1) atom. In the second O site, O(1) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one U(1) and one C(1) atom. Linkers: 2 [O]C(=O)c1cccc(C([O])=O)c1. Metal clusters: 2 [U]. The MOF has largest included sphere 1.94 A, density 3.20 g/cm3, surface area 2278.05 m2/g, accessible volume 0.07 cm3/g