A uranylcontaining compound [U(CO3)3(H2O)2]·2H2O has been synthesized under hydrothermal condition and characterized by X-ray single-crystal analysis. Crystal structural analysis indicates that this compound consists of three CO32- molecules, one U6+. The results reveal that the title compound presents a 3D frame work built up by O- H … O week hydrogen bonds interactions. The central uranium atom is eight-coordinated through three CO32 - molecules and two H2O. The compound shows a coplanar hexagonal network structure, each hexagon containing a hexagonal hole with a water moleculet.
