An X-ray diffraction study of aqueous solutions of lutetium trichloride
O. V. Grechin1, P. R. Smirnov2, V. N. Trostin2
1Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State Chemical Technological University, Ivanovo
2G. A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo
Keywords: aqueous solutions of lanthanides, structure, X-ray diffraction analysis, small angle maxima of scattering intensity, radial distribution functions
Abstract
The X-ray diffraction analysis is used to study aqueous solutions of lutetium chloride in a wide concentration range under standard conditions. Small angle peaks on the functions of the X-ray scattering intensity and the maxima of radial distribution functions of the atomic-electron density are interpreted. It is found that highly concentrated solutions are characterized by a unique quasi-crystalline structure distinguished by short- and long-range ordering. Dilution of solutions results in that the own structure of the solvent starts to play the major role in the structure of the systems. It is established for the first time that small angle peaks on the scattering intensity functions are also manifested for diluted solutions, which indicates that long-range ordering is preserved in them.
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