UH2(C3O4)2 crystallizes in the monoclinic C2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one O(11), one O(14), one O(15), one O(5), one O(7), one O(9), and two equivalent O(1) atoms. The U(1)-O(11) bond length is 2.34 Å. The U(1)-O(14) bond length is 2.29 Å. The U(1)-O(15) bond length is 2.39 Å. The U(1)-O(5) bond length is 2.52 Å. The U(1)-O(7) bond length is 2.30 Å. The U(1)-O(9) bond length is 2.38 Å. There is one shorter (2.00 Å) and one longer (2.20 Å) U(1)-O(1) bond length. In the second U site, U(2) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(13), one O(16), one O(6), one O(8), and two equivalent O(2) atoms. The U(2)-O(10) bond length is 2.36 Å. The U(2)-O(12) bond length is 2.35 Å. The U(2)-O(13) bond length is 2.31 Å. The U(2)-O(16) bond length is 2.41 Å. The U(2)-O(6) bond length is 2.51 Å. The U(2)-O(8) bond length is 2.29 Å. There is one shorter (1.99 Å) and one longer (2.21 Å) U(2)-O(2) bond length. There are sixteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(7) atom. The C(1)-C(5) bond length is 1.50 Å. The C(1)-O(3) bond length is 1.26 Å. The C(1)-O(7) bond length is 1.29 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(4), and one O(8) atom. The C(2)-C(6) bond length is 1.50 Å. The C(2)-O(4) bond length is 1.25 Å. The C(2)-O(8) bond length is 1.29 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(13), one C(15), and one C(5) atom. The C(3)-C(13) bond length is 1.40 Å. The C(3)-C(15) bond length is 1.50 Å. The C(3)-C(5) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(14), one C(16), and one C(6) atom. The C(4)-C(14) bond length is 1.40 Å. The C(4)-C(16) bond length is 1.50 Å. The C(4)-C(6) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(1), one C(11), and one C(3) atom. The C(5)-C(11) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(12), one C(2), and one C(4) atom. The C(6)-C(12) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(11) and two equivalent O(11) atoms. The C(7)-C(11) bond length is 1.50 Å. Both C(7)-O(11) bond lengths are 1.27 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(12) and two equivalent O(12) atoms. The C(8)-C(12) bond length is 1.50 Å. Both C(8)-O(12) bond lengths are 1.27 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(13) and two equivalent O(9) atoms. The C(9)-C(13) bond length is 1.50 Å. Both C(9)-O(9) bond lengths are 1.27 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(14) and two equivalent O(10) atoms. The C(10)-C(14) bond length is 1.50 Å. Both C(10)-O(10) bond lengths are 1.27 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(7) and two equivalent C(5) atoms. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(8) and two equivalent C(6) atoms. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(9) and two equivalent C(3) atoms. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(10) and two equivalent C(4) atoms. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(13), and one O(15) atom. The C(15)-O(13) bond length is 1.28 Å. The C(15)-O(15) bond length is 1.26 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(14), and one O(16) atom. The C(16)-O(14) bond length is 1.29 Å. The C(16)-O(16) bond length is 1.25 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. The H(3)-O(5) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. The H(4)-O(6) bond length is 0.99 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to two equivalent U(1) atoms. In the second O site, O(2) is bonded in a water-like geometry to two equivalent U(2) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one C(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one U(1), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one U(2), one H(2), and one H(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one U(2) and one C(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one U(1) and one C(9) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one U(2) and one C(10) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one U(1) and one C(7) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one U(2) and one C(8) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one U(2) and one C(15) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one U(1) and one C(16) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one U(1) and one C(15) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one U(2) and one C(16) atom. Linkers: 2 [O]C(=O)c1c(C([O])=O)c(C([O])=O)c(C([O])=O)c(C([O])=O)c1C([O])=O. Metal clusters: 4 [U]. The MOF has largest included sphere 1.91 A, density 3.84 g/cm3, surface area 1475.30 m2/g, accessible volume 0.04 cm3/g