UO2PbC14H6(NO4)2 crystallizes in the monoclinic C2/c space group. The structure consists of four pitchblend, uranium(iv) oxide, uranium(iv) dioxide, uranium dioxide molecules inside a PbC14H6(NO4)2 framework. In the PbC14H6(NO4)2 framework, Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Both Pb(1)-O(1) bond lengths are 2.67 Å. Both Pb(1)-O(2) bond lengths are 2.54 Å. Both Pb(1)-O(4) bond lengths are 2.74 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(1)-C(3) bond length is 1.39 Å. The C(1)-C(5) bond length is 1.49 Å. The C(1)-N(1) bond length is 1.34 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(1) atom. The C(2)-C(4) bond length is 1.39 Å. The C(2)-C(6) bond length is 1.40 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(4), and one H(2) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(2), one C(3), and one H(3) atom. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a bent 120 degrees geometry to one C(1), one O(1), and one O(4) atom. The C(5)-O(1) bond length is 1.30 Å. The C(5)-O(4) bond length is 1.25 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(2), one C(7), and one N(1) atom. The C(6)-C(7) bond length is 1.49 Å. The C(6)-N(1) bond length is 1.34 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(2), and one O(5) atom. The C(7)-O(2) bond length is 1.31 Å. The C(7)-O(5) bond length is 1.24 Å. N(1) is bonded in a distorted bent 120 degrees geometry to one C(1) and one C(6) atom. There are three 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(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1) and one C(5) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Pb(1) and one C(7) atom. In the third O site, O(4) is bonded in a single-bond geometry to one Pb(1) and one C(5) atom. In the fourth O site, O(5) is bonded in a single-bond geometry to one C(7) atom. Linkers: 4 [O]C(=O)c1cccc(C([O])=O)n1. Metal clusters: 2 [U] ,2 [Pb]. The MOF has largest included sphere 3.74 A, density 3.01 g/cm3, surface area 1977.59 m2/g, accessible volume 0.10 cm3/g