U3H4(CO7)2(CH3)2 crystallizes in the triclinic P-1 space group. The structure consists of two 02329_fluka molecules inside a U3H4(CO7)2 framework. In the U3H4(CO7)2 framework, there are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. Both U(1)-O(1) bond lengths are 1.84 Å. Both U(1)-O(4) bond lengths are 2.63 Å. Both U(1)-O(5) bond lengths are 2.61 Å. Both U(1)-O(6) bond lengths are 2.21 Å. In the second U site, U(2) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and two equivalent O(6) atoms to form distorted edge-sharing UO7 pentagonal bipyramids. The U(2)-O(2) bond length is 1.84 Å. The U(2)-O(3) bond length is 1.81 Å. The U(2)-O(4) bond length is 2.46 Å. The U(2)-O(5) bond length is 2.48 Å. The U(2)-O(7) bond length is 2.41 Å. Both U(2)-O(6) bond lengths are 2.25 Å. C(1) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(5) atom. The C(1)-O(4) bond length is 1.28 Å. The C(1)-O(5) bond length is 1.28 Å. There are two inequivalent H sites. In the first H site, H(4) is bonded in a distorted single-bond geometry to one O(2) and one O(7) atom. The H(4)-O(2) bond length is 1.64 Å. The H(4)-O(7) bond length is 1.00 Å. In the second H site, H(5) is bonded in a distorted single-bond geometry to one O(1) and one O(7) atom. The H(5)-O(1) bond length is 1.66 Å. The H(5)-O(7) bond length is 1.00 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one U(1) and one H(5) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one U(2) and one H(4) atom. In the third O site, O(3) is bonded in a single-bond geometry to one U(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one U(1), one U(2), and one C(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one U(1), one U(2), and one C(1) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one U(2), one H(4), and one H(5) atom. Linkers: 2 CC([O])=O. Metal clusters: 3 [U]. The MOF has largest included sphere 1.72 A, density 4.57 g/cm3, surface area 1499.84 m2/g, accessible volume 0.05 cm3/g