UC6N2H4O7 crystallizes in the orthorhombic P2_12_12_1 space group. U(1) is bonded in a 7-coordinate geometry to one N(1), one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. The U(1)-N(1) bond length is 2.57 Å. The U(1)-O(1) bond length is 2.36 Å. The U(1)-O(3) bond length is 2.44 Å. The U(1)-O(4) bond length is 2.31 Å. The U(1)-O(5) bond length is 1.80 Å. The U(1)-O(6) bond length is 1.81 Å. The U(1)-O(7) bond length is 2.39 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(4) and one N(1) atom. The C(1)-C(4) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.33 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one N(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(6) bond length is 1.49 Å. The C(2)-N(1) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(2), and one H(3) atom. The C(3)-N(2) bond length is 1.34 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(1), one N(2), and one H(4) atom. The C(4)-N(2) bond length is 1.34 Å. The C(4)-H(4) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(5)-O(1) bond length is 1.29 Å. The C(5)-O(2) bond length is 1.25 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(6)-O(3) bond length is 1.27 Å. The C(6)-O(4) bond length is 1.26 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted bent 120 degrees geometry to one U(1), one C(1), and one C(2) atom. In the second N site, N(2) is bonded in a bent 120 degrees geometry to one C(3) and one C(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one O(2) and one O(7) atom. The H(1)-O(2) bond length is 1.60 Å. The H(1)-O(7) bond length is 1.02 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(7) atom. The H(2)-O(7) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(5) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one C(5) and one H(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one U(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one U(1) and one C(6) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one U(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one U(1), one H(1), and one H(2) atom. Linkers: 4 [O]C(=O)c1cncc(C([O])=O)n1. Metal clusters: 4 [U]. The MOF has largest included sphere 1.92 A, density 3.27 g/cm3, surface area 2155.42 m2/g, accessible volume 0.05 cm3/g