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X-Ray Diffraction Data on the Structure of the Nearest Environment of Ions in Aqueous Solutions of Calcium Nitrate

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Abstract

Ion coordination is determined by the X-ray diffraction analysis in aqueous solutions of calcium nitrate in a wide concentration range. In the saturated solution, the cation coordinates five water molecules and one nitrate ion in the monodentate fashion. As the solution is diluted, the number of water molecules coordinated in the first shell of the Ca2+ ion gradually increases to six, and the second coordination sphere of the cation and the hydration shell of the anion begin to form. Ion pairs govern the structures of solutions in the entire concentration range studied.

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Funding

The study was supported by RFBR and Ivanovo Oblast’ as a part of scientific project No. 20-43-370001.

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Authors and Affiliations

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

    P. R. Smirnov

  2. Ivanovo State University of Chemistry and Technology, Ivanovo, Russia

    O. V. Grechin

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  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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The authors declare that they have no conflicts of interests.

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Russian Text © The Author(s), 2023, published in Zhurnal Strukturnoi Khimii, 2023, Vol. 64, No. 3, 107966.https://doi.org/10.26902/JSC_id107966

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Smirnov, P.R., Grechin, O.V. X-Ray Diffraction Data on the Structure of the Nearest Environment of Ions in Aqueous Solutions of Calcium Nitrate. J Struct Chem 64, 486–492 (2023). https://doi.org/10.1134/S0022476623030137

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