x-ray diffraction stuDy of [MI(NH3)5Cl][MIIBr6] (MI = Rh, Ir; MII = Re, Ir) polycrystals
K. V. Yusenko, E. A. Shusharina, S. A. Gromilov
Keywords: powder X-ray analysis, full-profile analysis, Rietveld method, crystal chemistry, double complex salts of Rh, Ir and Re, Ir
Pages: 969-975
Abstract
Based on the X-ray diffraction data for polycrystals, the crystal structures of double complex salts [Rh(NH3)5Cl][ReBr6] and [Ir(NH3)5Cl][ReBr6] are refined. The structure of [Rh(NH3)5Cl][IrBr6] is determined. Initial models are constructed using the Monte Carlo method in the straight space. Further refinement is made by the Rietveld method. It is shown that such an approach is suitable for the refinement of crystal structures composed of isolated rigid polyhedra and can be used to determine the structure of salts without structural analogues.
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