U3H7(C6O5)3 crystallizes in the monoclinic P2_1/m space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(16), one O(2), and one O(3) atom. The U(1)-O(1) bond length is 2.58 Å. The U(1)-O(14) bond length is 2.55 Å. The U(1)-O(15) bond length is 2.21 Å. The U(1)-O(16) bond length is 2.48 Å. The U(1)-O(2) bond length is 2.42 Å. The U(1)-O(3) bond length is 2.48 Å. In the second U site, U(2) is bonded in a hexagonal planar geometry to one O(10), one O(11), one O(12), one O(13), one O(8), and one O(9) atom. The U(2)-O(10) bond length is 2.48 Å. The U(2)-O(11) bond length is 2.49 Å. The U(2)-O(12) bond length is 2.47 Å. The U(2)-O(13) bond length is 2.49 Å. The U(2)-O(8) bond length is 2.48 Å. The U(2)-O(9) bond length is 2.46 Å. In the third U site, U(3) is bonded in a pentagonal planar geometry to one O(15), two equivalent O(3), and two equivalent O(4) atoms. The U(3)-O(15) bond length is 2.25 Å. Both U(3)-O(3) bond lengths are 2.46 Å. Both U(3)-O(4) bond lengths are 2.34 Å. In the fourth U site, U(4) is bonded in a pentagonal planar geometry to one O(16), two equivalent O(6), and two equivalent O(7) atoms. The U(4)-O(16) bond length is 2.54 Å. Both U(4)-O(6) bond lengths are 2.43 Å. Both U(4)-O(7) bond lengths are 2.32 Å. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.43 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.51 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(8) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(8) bond length is 1.49 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(4) bond length is 1.36 Å. The C(3)-H(2) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(9) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-C(9) bond length is 1.50 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(3) atom. The C(5)-H(3) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1) and one H(4) atom. The C(6)-H(4) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(4), and one O(6) atom. The C(7)-O(4) bond length is 1.26 Å. The C(7)-O(6) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(5) atom. The C(8)-O(3) bond length is 1.33 Å. The C(8)-O(5) bond length is 1.20 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(8), and one O(9) atom. The C(9)-O(8) bond length is 1.26 Å. The C(9)-O(9) bond length is 1.28 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(16) atom. The C(10)-C(11) bond length is 1.42 Å. The C(10)-C(15) bond length is 1.39 Å. The C(10)-C(16) bond length is 1.48 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(17) atom. The C(11)-C(12) bond length is 1.37 Å. The C(11)-C(17) bond length is 1.50 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(13), and one H(5) atom. The C(12)-C(13) bond length is 1.38 Å. The C(12)-H(5) bond length is 0.93 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(18) atom. The C(13)-C(14) bond length is 1.38 Å. The C(13)-C(18) bond length is 1.51 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one H(6) atom. The C(14)-H(6) bond length is 0.93 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(10) and one H(7) atom. The C(15)-H(7) bond length is 0.93 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(2), and one O(7) atom. The C(16)-O(2) bond length is 1.24 Å. The C(16)-O(7) bond length is 1.27 Å. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(12), and one O(13) atom. The C(17)-O(12) bond length is 1.26 Å. The C(17)-O(13) bond length is 1.28 Å. In the eighteenth C site, C(18) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(10), and one O(11) atom. The C(18)-O(10) bond length is 1.26 Å. The C(18)-O(11) bond length is 1.27 Å. There are seven 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 0.82 Å. 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. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(12) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(14) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(15) atom. There are sixteen inequivalent O sites. In the first O site, O(15) is bonded in a trigonal planar geometry to one U(3) and two equivalent U(1) atoms. In the second O site, O(16) is bonded in a trigonal planar geometry to one U(4) and two equivalent U(1) atoms. In the third O site, O(1) is bonded in a 2-coordinate geometry to one U(1) and one O(14) atom. The O(1)-O(14) bond length is 0.90 Å. In the fourth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(16) atom. In the fifth O site, O(3) is bonded in a distorted single-bond geometry to one U(1), one U(3), and one C(8) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one U(3) and one C(7) atom. In the seventh O site, O(5) is bonded in a water-like geometry to one C(8) and one H(1) atom. In the eighth O site, O(6) is bonded in a distorted single-bond geometry to one U(4) and one C(7) atom. In the ninth O site, O(7) is bonded in a distorted single-bond geometry to one U(4) and one C(16) atom. In the tenth O site, O(8) is bonded in a distorted L-shaped geometry to one U(2) and one C(9) atom. In the eleventh O site, O(9) is bonded in a distorted L-shaped geometry to one U(2) and one C(9) atom. In the twelfth O site, O(10) is bonded in a distorted single-bond geometry to one U(2) and one C(18) atom. In the thirteenth O site, O(11) is bonded in a distorted single-bond geometry to one U(2) and one C(18) atom. In the fourteenth O site, O(12) is bonded in a distorted single-bond geometry to one U(2) and one C(17) atom. In the fifteenth O site, O(13) is bonded in a distorted L-shaped geometry to one U(2) and one C(17) atom. In the sixteenth O site, O(14) is bonded in an L-shaped geometry to one U(1) and one O(1) atom. Linkers: 1 [CH].[CH].[CH].[CH].[CH].[CH].[CH].[CH][C]=[CH].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C]=O.[C]=O.[C]=O.[C]=O.[C]=O.[C]O[U]([O])[O].[C][C].[C][C].[C][O].[H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[OH].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O][C]=O.[O][U].[O][U][O].[O][U][O].[U] ,2 [O]C(=O)c1ccc(C([O])=O)c(C([O])=O)c1 ,1 [CH].[CH].[CH].[CH].[CH].[CH].[CH].[CH].[CH].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C]=O.[C]=O.[C]=O.[C]=O.[C]=O.[C][C].[C][C].[C][C].[C][C].[H].[H].[H].[H].[H].[H].[H].[H].[H].[H].[OH].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O].[O][C]=O.[O][C]O.[O][U].[U].[U] ,2 [O]C(=O)c1ccc(C([O])=O)c(C(=O)O)c1. Metal clusters: 8 [U] ,2 [C]1O[U]23(O1)(O[C]O2)O[C]O3. The MOF has largest included sphere 4.23 A, density 2.81 g/cm3, surface area 2062.41 m2/g, accessible volume 0.11 cm3/g