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Ion Coordination in Aqueous Lanthanum Chloride and Lanthanum Nitrate Solutions as Probed by X-ray Diffraction

  • PHYSICAL CHEMISTRY OF SOLUTIONS
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Abstract

The results of an X-ray diffraction experiment in liquids were used to calculate radial distribution functions for water–electrolyte systems comprising lanthanum chloride and lanthanum nitrate over a considerable range of concentrations. A variety of structural models were designed for the systems studied. A set of theoretical functions was calculated for each model, and those functions were compared against the experimentally determined ones. Optimal variants were determined from the best fit between the experiment and calculation. The structural description of the nearest-neighboring of ions has been quantified in the form of coordination numbers, distances in scattering groups, and parameters of various types of ion pairs. The short range order formed by La3+ ions in water–electrolyte mixtures of lanthanum chloride and nitrate and its transformations in response to changing concentration are similar in both systems.

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Funding

This work was supported by the Russian Foundation for Basic Research, project no. 20-43-370001.

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Authors and Affiliations

  1. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045, Ivanovo, Russia

    P. R. Smirnov

  2. Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemical Technologies, 153000, Ivanovo, Russia

    O. V. Grechin & A. S. Vashurin

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  1. P. R. Smirnov
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  2. O. V. Grechin
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  3. A. S. Vashurin
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Correspondence to P. R. Smirnov.

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Translated by O. Fedorova

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Smirnov, P.R., Grechin, O.V. & Vashurin, A.S. Ion Coordination in Aqueous Lanthanum Chloride and Lanthanum Nitrate Solutions as Probed by X-ray Diffraction. Russ. J. Inorg. Chem. 67, 382–387 (2022). https://doi.org/10.1134/S0036023622030111

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