NaU2C50H20(N3O8)2(CH)10 crystallizes in the monoclinic C2/c space group. The structure consists of forty 02329_fluka molecules inside a NaU2C50H20(N3O8)2 framework. In the NaU2C50H20(N3O8)2 framework, Na(1) is bonded in a hexagonal bipyramidal geometry to two equivalent O(1), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. Both Na(1)-O(1) bond lengths are 2.52 Å. Both Na(1)-O(4) bond lengths are 2.46 Å. Both Na(1)-O(6) bond lengths are 2.55 Å. Both Na(1)-O(8) bond lengths are 2.51 Å. U(1) is bonded in a hexagonal planar geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. The U(1)-O(1) bond length is 2.50 Å. The U(1)-O(2) bond length is 2.48 Å. The U(1)-O(3) bond length is 2.49 Å. The U(1)-O(5) bond length is 2.47 Å. The U(1)-O(6) bond length is 2.48 Å. The U(1)-O(7) bond length is 2.37 Å. There are twenty-five inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(12), one C(30), and one N(1) atom. The C(1)-C(12) bond length is 1.42 Å. The C(1)-C(30) bond length is 1.50 Å. The C(1)-N(1) bond length is 1.31 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(18), one C(19), and one N(1) atom. The C(2)-C(18) bond length is 1.46 Å. The C(2)-C(19) bond length is 1.33 Å. The C(2)-N(1) bond length is 1.36 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(2), and one O(3) atom. The C(4)-C(9) bond length is 1.48 Å. The C(4)-O(2) bond length is 1.33 Å. The C(4)-O(3) bond length is 1.25 Å. In the fourth C site, C(5) is bonded in a distorted single-bond geometry to one C(27) and one H(2) atom. The C(5)-C(27) bond length is 1.38 Å. The C(5)-H(2) bond length is 0.93 Å. In the fifth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(28), one C(8), and one N(3) atom. The C(6)-C(28) bond length is 1.41 Å. The C(6)-C(8) bond length is 1.42 Å. The C(6)-N(3) bond length is 1.39 Å. In the sixth C site, C(7) is bonded in a distorted single-bond geometry to one C(26), one C(9), and one H(3) atom. The C(7)-C(26) bond length is 1.44 Å. The C(7)-C(9) bond length is 1.34 Å. The C(7)-H(3) bond length is 0.93 Å. In the seventh C site, C(8) is bonded in a trigonal planar geometry to one C(29), one C(6), and one C(9) atom. The C(8)-C(29) bond length is 1.42 Å. The C(8)-C(9) bond length is 1.40 Å. In the eighth C site, C(9) is bonded in a trigonal planar geometry to one C(4), one C(7), and one C(8) atom. In the ninth C site, C(10) is bonded in a trigonal planar geometry to one C(12), one C(18), and one C(21) atom. The C(10)-C(12) bond length is 1.36 Å. The C(10)-C(18) bond length is 1.41 Å. The C(10)-C(21) bond length is 1.48 Å. In the tenth C site, C(11) is bonded in a trigonal planar geometry to one C(13), one C(20), and one C(27) atom. The C(11)-C(13) bond length is 1.38 Å. The C(11)-C(20) bond length is 1.51 Å. The C(11)-C(27) bond length is 1.47 Å. In the eleventh C site, C(12) is bonded in a distorted single-bond geometry to one C(1), one C(10), and one H(4) atom. The C(12)-H(4) bond length is 0.93 Å. In the twelfth C site, C(13) is bonded in a distorted single-bond geometry to one C(11), one C(30), and one H(5) atom. The C(13)-C(30) bond length is 1.42 Å. The C(13)-H(5) bond length is 0.93 Å. In the thirteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(14) and one H(6) atom. The C(15)-C(14) bond length is 1.48 Å. The C(15)-H(6) bond length is 0.93 Å. In the fourteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(18) and one H(7) atom. The C(16)-C(18) bond length is 1.43 Å. The C(16)-H(7) bond length is 0.93 Å. In the fifteenth C site, C(18) is bonded in a trigonal planar geometry to one C(10), one C(16), and one C(2) atom. In the sixteenth C site, C(19) is bonded in a distorted single-bond geometry to one C(2) and one H(9) atom. The C(19)-H(9) bond length is 0.93 Å. In the seventeenth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(1), and one O(5) atom. The C(20)-O(1) bond length is 1.25 Å. The C(20)-O(5) bond length is 1.25 Å. In the eighteenth C site, C(21) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(6), and one O(7) atom. The C(21)-O(6) bond length is 1.29 Å. The C(21)-O(7) bond length is 1.30 Å. In the nineteenth C site, C(24) is bonded in a distorted single-bond geometry to one C(28) and one H(12) atom. The C(24)-C(28) bond length is 1.40 Å. The C(24)-H(12) bond length is 0.93 Å. In the twentieth C site, C(26) is bonded in a distorted trigonal planar geometry to one C(26), one C(7), and one N(3) atom. The C(26)-C(26) bond length is 1.42 Å. The C(26)-N(3) bond length is 1.33 Å. In the twenty-first C site, C(27) is bonded in a trigonal planar geometry to one C(11), one C(14), and one C(5) atom. The C(27)-C(14) bond length is 1.39 Å. In the twenty-second C site, C(28) is bonded in a distorted trigonal planar geometry to one C(24), one C(6), and one H(14) atom. The C(28)-H(14) bond length is 0.93 Å. In the twenty-third C site, C(29) is bonded in a single-bond geometry to one C(8) and one H(15) atom. The C(29)-H(15) bond length is 0.93 Å. In the twenty-fourth C site, C(30) is bonded in a distorted trigonal planar geometry to one C(1), one C(13), and one N(2) atom. The C(30)-N(2) bond length is 1.31 Å. In the twenty-fifth C site, C(14) is bonded in a distorted trigonal planar geometry to one C(15), one C(27), and one N(2) atom. The C(14)-N(2) bond length is 1.40 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a bent 120 degrees geometry to 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(14) and one C(30) atom. In the third N site, N(3) is bonded in a bent 120 degrees geometry to one C(26) and one C(6) atom. There are ten inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(12) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(13) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(15) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(16) atom. In the seventh H site, H(9) is bonded in a single-bond geometry to one C(19) atom. In the eighth H site, H(12) is bonded in a single-bond geometry to one C(24) atom. In the ninth H site, H(14) is bonded in a single-bond geometry to one C(28) atom. In the tenth H site, H(15) is bonded in a single-bond geometry to one C(29) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), one U(1), and one C(20) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one U(1) and one C(4) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one U(1) and one C(4) atom. In the fourth O site, O(4) is bonded in a distorted L-shaped geometry to one Na(1) and one O(8) atom. The O(4)-O(8) bond length is 1.39 Å. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one U(1) and one C(20) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Na(1), one U(1), and one C(21) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one U(1) and one C(21) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one Na(1) and one O(4) atom. Linkers: 12 [O]C(=O)c1cc(-c2cc(C([O])=O)c3ccccc3n2)nc2ccccc12. Metal clusters: 4 [C]1O[U]23(O1)(O[C]O2)O[C]O3.[C]1O[U]23(O1)(O[C]O2)O[C]O3.[O]O[Na].[O][O]. RCSR code: pcu. The MOF has largest included sphere 6.38 A, density 1.44 g/cm3, surface area 3417.25 m2/g, accessible volume 0.28 cm3/g