UO2C6H5NO2(CO2)2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four 2-dihydroisonicotinic acid molecules; eight formic acid molecules; and four pitchblend, uranium(iv) oxide, uranium(iv) dioxide, uranium dioxide molecules. Linkers: 1 [O]C(=O)C([O])=O. Metal clusters: 2 [U]. The MOF has largest included sphere 2.05 A, density 3.00 g/cm3, surface area 2390.28 m2/g, accessible volume 0.08 cm3/g