Synthesis and Structure of (Rb0.50Ba0.25)[UO2(CH3COO)3]

A new compound (Rb0.50Ba0.25)[UO2(CH3COO)(3)] is synthesized and its crystal structure is studied by X-ray diffraction. The compound crystallizes in the form of yellow plates belonging to the cubic crystal system. The unit cell parameter a = 17.0367(1) angstrom, V = 4944.89(5) angstrom(3), space group I (4) over bar 3d, Z = 16, and R = 0.0182. The coordination polyhedron of the uranium atom is a hexagonal bipyramid with oxygen atoms of three acetate groups and the uranyl group in the vertices. The crystal chemical formula of the uranium-containing group is AB(3)(01) (A = UO22+, B-01 = CH3COO-). The oxygen atoms of the acetate groups that enter the coordination polyhedron of uranium are bound to barium and rubidium atoms.