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Coordination of Ions in Aqueous Manganese Chloride Solutions: X-ray Diffraction Data

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Abstract

The radial distribution functions of aqueous manganese chloride solutions are calculated from experimental X-ray diffraction data in a wide range of concentrations under standard conditions. Different models of the structural organization of the systems are developed. The optimum variants are revealed by calculating theoretical functions for each model and comparing their correspondence to experimental functions. Quantitative parameters of the immediate environment of Mn2+ and Cl– ions (coordination numbers, interparticle distance, and types of ion pairs) are found. It is shown that contact ion pairs determine the structure of a saturated solution. It is found that dilution results in contact ion pairs becoming non-contact and the independent hydration of the ions.

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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 Chemistry and Technology, 153000, Ivanovo, Russia

    O. V. Grechin

Authors
  1. P. R. Smirnov
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  2. O. V. Grechin
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Correspondence to P. R. Smirnov.

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Translated by A. Tulyabaev

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Smirnov, P.R., Grechin, O.V. Coordination of Ions in Aqueous Manganese Chloride Solutions: X-ray Diffraction Data. Russ. J. Phys. Chem. 93, 2213–2217 (2019). https://doi.org/10.1134/S0036024419110281

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  • DOI: https://doi.org/10.1134/S0036024419110281

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