UC7NH3O6 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded in a 7-coordinate geometry to one N(1), one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The U(1)-N(1) bond length is 2.66 Å. The U(1)-O(1) bond length is 1.80 Å. The U(1)-O(2) bond length is 1.80 Å. The U(1)-O(3) bond length is 2.40 Å. The U(1)-O(4) bond length is 2.32 Å. The U(1)-O(5) bond length is 2.39 Å. The U(1)-O(6) bond length is 2.38 Å. There are seven inequivalent C sites. In the first C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(1), and one H(3) atom. The C(5)-C(4) bond length is 1.40 Å. The C(5)-N(1) bond length is 1.33 Å. The C(5)-H(3) bond length is 1.09 Å. In the second C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(4), and one O(5) atom. The C(6)-C(4) bond length is 1.49 Å. The C(6)-O(4) bond length is 1.27 Å. The C(6)-O(5) bond length is 1.27 Å. In the third C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(3), and one O(6) atom. The C(7)-C(1) bond length is 1.50 Å. The C(7)-O(3) bond length is 1.27 Å. The C(7)-O(6) bond length is 1.27 Å. In the fourth C site, C(1) is bonded in a distorted single-bond geometry to one C(2), one C(7), and one N(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.35 Å. In the fifth C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 1.09 Å. In the sixth C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(2) bond length is 1.09 Å. In the seventh C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. N(1) is bonded in a distorted bent 120 degrees geometry to one U(1), one C(1), and one C(5) atom. There are three 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(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 150 degrees geometry to one U(1) and one C(6) atom. In the second O site, O(6) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(7) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one U(1) and one C(6) atom. In the fourth O site, O(1) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the sixth O site, O(3) is bonded in a distorted single-bond geometry to one U(1) and one C(7) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)nc1. Metal clusters: 4 [U]. The MOF has largest included sphere 2.23 A, density 3.33 g/cm3, surface area 2119.98 m2/g, accessible volume 0.06 cm3/g