UZnH10(C2O3)6 crystallizes in the triclinic P-1 space group. U(1) is bonded in a distorted hexagonal bipyramidal geometry to two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. Both U(1)-O(5) bond lengths are 2.39 Å. Both U(1)-O(6) bond lengths are 2.55 Å. Both U(1)-O(7) bond lengths are 2.55 Å. Both U(1)-O(9) bond lengths are 1.82 Å. Zn(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(8) atoms. Both Zn(1)-O(2) bond lengths are 2.11 Å. Both Zn(1)-O(3) bond lengths are 2.08 Å. Both Zn(1)-O(8) bond lengths are 2.10 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(5) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(3) bond length is 1.25 Å. The C(1)-O(5) bond length is 1.28 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(6) atom. The C(2)-C(5) bond length is 1.41 Å. The C(2)-C(6) bond length is 1.41 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(6), and one O(7) atom. The C(3)-C(6) bond length is 1.52 Å. The C(3)-O(6) bond length is 1.26 Å. The C(3)-O(7) bond length is 1.28 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(1), and one O(4) atom. The C(4)-C(5) bond length is 1.50 Å. The C(4)-O(1) bond length is 1.23 Å. The C(4)-O(4) bond length is 1.34 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(5)-C(6) bond length is 1.41 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. The H(2)-O(2) bond length is 0.98 Å. In the third H site, H(3) is bonded in a distorted single-bond geometry to one O(8) atom. The H(3)-O(8) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) atom. The H(4)-O(8) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(4) atom. The H(5)-O(4) bond length is 0.98 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one C(4) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Zn(1), one H(1), and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one C(4) and one H(5) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one U(1) and one C(3) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one U(1) and one C(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(3), and one H(4) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one U(1) atom. Linkers: 1 [O]C(=O)c1c(C([O])=O)c(C(=O)O)c(C([O])=O)c(C([O])=O)c1C(=O)O. Metal clusters: 1 [U] ,1 [Zn]. The MOF has largest included sphere 2.49 A, density 2.77 g/cm3, surface area 2368.24 m2/g, accessible volume 0.07 cm3/g