UCH2(OF)3 crystallizes in the monoclinic C2/c space group. U(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms. The U(1)-O(1) bond length is 2.45 Å. The U(1)-O(2) bond length is 2.47 Å. The U(1)-O(3) bond length is 2.43 Å. There is one shorter (2.28 Å) and one longer (2.30 Å) U(1)-F(1) bond length. There is one shorter (2.27 Å) and one longer (2.50 Å) U(1)-F(2) bond length. There is one shorter (2.28 Å) and one longer (2.34 Å) U(1)-F(3) bond length. C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.28 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) atom. The H(1)-O(3) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(3) and one F(2) atom. The H(2)-O(3) bond length is 0.99 Å. The H(2)-F(2) bond length is 1.68 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one U(1), one H(1), and one H(2) atom. There are three inequivalent F sites. In the first F site, F(3) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms. In the second F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms. In the third F site, F(2) is bonded in a 3-coordinate geometry to two equivalent U(1) and one H(2) atom. Linkers: 1 [O]C(=O)C([O])=O. Metal clusters: 4 [U]. The MOF has largest included sphere 1.69 A, density 5.29 g/cm3, surface area 1109.26 m2/g, accessible volume 0.02 cm3/g