U3P4H6(C7O8)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(16), one O(2), and one O(3) atom. The U(1)-O(1) bond length is 2.28 Å. The U(1)-O(11) bond length is 2.31 Å. The U(1)-O(16) bond length is 2.35 Å. The U(1)-O(2) bond length is 2.45 Å. The U(1)-O(3) bond length is 2.47 Å. In the second U site, U(2) is bonded in a distorted T-shaped geometry to one O(10), one O(12), and one O(8) atom. The U(2)-O(10) bond length is 2.31 Å. The U(2)-O(12) bond length is 2.30 Å. The U(2)-O(8) bond length is 2.29 Å. In the third U site, U(3) is bonded in a rectangular see-saw-like geometry to one O(13), one O(14), one O(4), and one O(5) atom. The U(3)-O(13) bond length is 2.25 Å. The U(3)-O(14) bond length is 2.29 Å. The U(3)-O(4) bond length is 2.28 Å. The U(3)-O(5) bond length is 2.28 Å. There are fourteen 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(2), and one O(3) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(2) bond length is 1.25 Å. The C(1)-O(3) 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(3), and one C(7) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-C(7) bond length is 1.39 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(1) atom. The C(3)-C(4) bond length is 1.38 Å. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one P(1) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-P(1) bond length is 1.81 Å. In the fifth C site, C(5) is bonded in a single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(2) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one C(7), and one P(2) atom. The C(6)-C(7) bond length is 1.36 Å. The C(6)-P(2) bond length is 1.80 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.93 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(9), one O(6), and one O(7) atom. The C(8)-C(9) bond length is 1.54 Å. The C(8)-O(6) bond length is 1.23 Å. The C(8)-O(7) bond length is 1.30 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(8) atom. The C(9)-C(10) bond length is 1.41 Å. The C(9)-C(14) bond length is 1.40 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(9), and one H(4) atom. The C(10)-C(11) bond length is 1.41 Å. The C(10)-H(4) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one C(12), and one P(3) atom. The C(11)-C(12) bond length is 1.38 Å. The C(11)-P(3) bond length is 1.78 Å. In the twelfth C site, C(12) is bonded in a single-bond geometry to one C(11), one C(13), and one H(5) atom. The C(12)-C(13) bond length is 1.40 Å. The C(12)-H(5) bond length is 0.93 Å. In the thirteenth C site, C(13) is bonded in a distorted trigonal planar geometry to one C(12), one C(14), and one P(4) atom. The C(13)-C(14) bond length is 1.37 Å. The C(13)-P(4) bond length is 1.78 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(9), and one H(6) atom. The C(14)-H(6) bond length is 0.93 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one C(4), one O(11), one O(12), and one O(13) atom. The P(1)-O(11) bond length is 1.50 Å. The P(1)-O(12) bond length is 1.52 Å. The P(1)-O(13) bond length is 1.53 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one C(6), one O(14), one O(15), and one O(16) atom. The P(2)-O(14) bond length is 1.52 Å. The P(2)-O(15) bond length is 1.54 Å. The P(2)-O(16) bond length is 1.51 Å. In the third P site, P(3) is bonded in a tetrahedral geometry to one C(11), one O(1), one O(4), and one O(5) atom. The P(3)-O(1) bond length is 1.51 Å. The P(3)-O(4) bond length is 1.53 Å. The P(3)-O(5) bond length is 1.50 Å. In the fourth P site, P(4) is bonded in a tetrahedral geometry to one C(13), one O(10), one O(8), and one O(9) atom. The P(4)-O(10) bond length is 1.49 Å. The P(4)-O(8) bond length is 1.49 Å. The P(4)-O(9) bond length is 1.55 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(10) 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. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one U(1) and one P(3) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to one U(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to one U(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one U(3) and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one U(3) and one P(3) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one C(8) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one U(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one P(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one U(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one U(1) and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one U(2) and one P(1) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one U(3) and one P(1) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one U(3) and one P(2) atom. In the fifteenth O site, O(15) is bonded in a single-bond geometry to one P(2) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one U(1) and one P(2) atom. Linkers: 8 [O]C(=O)c1cc(P([O])([O])=O)cc(P([O])([O])=O)c1. Metal clusters: 12 [U]. The MOF has largest included sphere 9.32 A, density 1.54 g/cm3, surface area 2193.80 m2/g, accessible volume 0.46 cm3/g