Crystal Structure of R[UO2(CH3COO)3] (R = NH4+, K+, or Cs+)

The single crystal structure of NH4[UO2(CH3COO)(3)] (I), K[UO2(CH3COO)(3)] (II), and Cs[UO2(CH3COO)(3)] (III) is studied by X-ray diffraction. I and II crystallize in the tetragonal crystal system. The crystal data are as follows: a = 13.6985(3) and c = 27.5678(14) , V = 5173.1(3) (3), space group I4(1)/a, Z = 16, and R = 0.023 for I; a = 13.8890(5) and c = 26.0839(18) , V = 5031.7(4) (3), space group I4(1)/a, Z = 16, and R = 0.037 for II. Crystals III are orthorhombic, a = 18.176(2), b = 13.119(2), and c = 22.088(4) , V = 5267(1)(3), space group Pbca, Z = 16, and R = 0.0424. In structures I-III, the uranium-containing structural units are represented by discrete mononuclear [UO2(CH3COO)(3)](-) groups, which belong to the AB (3) (01) (A = UO (2) (2+) , B (01)=CH3COO-) crystal chemical group of uranyl complexes.