U3Cu2P4H12(C6O5)4(CH)4 crystallizes in the triclinic P-1 space group. The structure consists of four 02329_fluka molecules inside a U3Cu2P4H12(C6O5)4 framework. In the U3Cu2P4H12(C6O5)4 framework, there are two inequivalent U sites. In the first U site, U(1) is bonded in a distorted pentagonal planar geometry to one O(1), one O(3), one O(4), and two equivalent O(5) atoms. The U(1)-O(1) bond length is 2.30 Å. The U(1)-O(3) bond length is 2.28 Å. The U(1)-O(4) bond length is 2.47 Å. There is one shorter (2.37 Å) and one longer (2.53 Å) U(1)-O(5) bond length. In the second U site, U(2) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(6) atoms. Both U(2)-O(2) bond lengths are 2.28 Å. Both U(2)-O(6) bond lengths are 2.28 Å. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(10), one O(7), one O(8), and one O(9) atom. The Cu(1)-O(10) bond length is 1.94 Å. The Cu(1)-O(7) bond length is 1.96 Å. The Cu(1)-O(8) bond length is 1.96 Å. The Cu(1)-O(9) bond length is 1.96 Å. There are twelve 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 P(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.40 Å. The C(1)-P(1) bond length is 1.80 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-H(1) bond length is 0.95 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.37 Å. The C(3)-C(7) bond length is 1.48 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(4)-H(2) bond length is 0.95 Å. In the fifth 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 0.95 Å. In the sixth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(7), and one O(8) atom. The C(7)-O(7) bond length is 1.28 Å. The C(7)-O(8) bond length is 1.28 Å. In the seventh C site, C(8) is bonded in a trigonal planar geometry to one C(13), one C(9), and one P(2) atom. The C(8)-C(13) bond length is 1.41 Å. The C(8)-C(9) bond length is 1.38 Å. The C(8)-P(2) bond length is 1.80 Å. In the eighth C site, C(9) is bonded in a distorted single-bond geometry to one C(10), one C(8), and one H(5) atom. The C(9)-C(10) bond length is 1.38 Å. The C(9)-H(5) bond length is 0.95 Å. In the ninth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(14), and one C(9) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-C(14) bond length is 1.50 Å. In the tenth C site, C(11) is bonded in a distorted single-bond geometry to one C(10) and one H(6) atom. The C(11)-H(6) bond length is 0.95 Å. In the eleventh C site, C(13) is bonded in a distorted single-bond geometry to one C(8) and one H(8) atom. The C(13)-H(8) bond length is 0.95 Å. In the twelfth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(10), and one O(9) atom. The C(14)-O(10) bond length is 1.24 Å. The C(14)-O(9) bond length is 1.27 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one C(1), one O(1), one O(2), and one O(3) atom. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.51 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one C(8), one O(4), one O(5), and one O(6) atom. The P(2)-O(4) bond length is 1.52 Å. The P(2)-O(5) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.53 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one C(13) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one U(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one U(2) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one U(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one U(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent U(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one U(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(7) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(7) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(14) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(14) atom. Linkers: 4 [O]C(=O)c1cccc(P([O])([O])=O)c1. Metal clusters: 3 [U] ,1 [C]1O[Cu]234O[C]O[Cu]2(O1)(O[C]O3)O[C]O4. The MOF has largest included sphere 5.08 A, density 2.29 g/cm3, surface area 2365.98 m2/g, accessible volume 0.22 cm3/g