NaU2(CO2)6(CH)6(C2O)3 crystallizes in the orthorhombic C222_1 space group. The structure is zero-dimensional and consists of twenty-four 02329_fluka molecules, twelve dimethyl ether molecules, and four NaU2(CO2)6 clusters. In each NaU2(CO2)6 cluster, Na(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(5) atoms. Both Na(1)-O(2) bond lengths are 2.41 Å. Both Na(1)-O(5) bond lengths are 2.48 Å. U(1) is bonded in a hexagonal planar geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The U(1)-O(1) bond length is 2.44 Å. The U(1)-O(2) bond length is 2.51 Å. The U(1)-O(3) bond length is 2.44 Å. The U(1)-O(4) bond length is 2.49 Å. The U(1)-O(5) bond length is 2.53 Å. The U(1)-O(6) bond length is 2.44 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.21 Å. The C(1)-O(2) bond length is 1.30 Å. In the second C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(5) atom. The C(5)-O(3) bond length is 1.28 Å. The C(5)-O(5) bond length is 1.27 Å. In the third C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(6) atom. The C(8)-O(4) bond length is 1.27 Å. The C(8)-O(6) bond length is 1.28 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one U(1) and one C(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), 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(5) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one U(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one U(1), and one C(5) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one U(1) and one C(8) atom. Linkers: 6 [O]C(=O)c1ccc(C([O])=O)o1. Metal clusters: 2 [C]1O[U]23(O1)(O[C]O2)O[C]O3.[Na]O[C]O[U]12(O[C]O1)O[C]O2. RCSR code: pcu. The MOF has largest included sphere 5.02 A, density 2.11 g/cm3, surface area 2680.87 m2/g, accessible volume 0.14 cm3/g