Structure of concentrated aqueous solutions of scandium chloride
- Authors: Smirnov P.R.1, Grechin O.V.2
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Affiliations:
- Krestov Institute of Solution Chemistry
- Research Institute of Thermodynamics and Kinetics of Chemical Processes
- Issue: Vol 91, No 3 (2017)
- Pages: 517-520
- Section: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/169337
- DOI: https://doi.org/10.1134/S0036024417030268
- ID: 169337
Cite item
Abstract
It is shown via X-ray diffraction that aqueous solutions of scandium chloride form ionic associates in a wide range of concentrations. It is established that the Sc3+ ion coordination number increases upon dilution to 8.2 at an unchanged Sc3+–OH2 distance of 0.215 nm. The second coordination sphere of the cation forms at an average distance of 0.420 nm. The number of solvent molecules in the sphere logically increases during dilution. It is concluded that the anion does not form its own sphere in highly concentrated solutions. This coordination sphere begins to form only in solutions with moderate concentrations at a distance of 0.315 nm, and it contains six water molecules in diluted solutions.
About the authors
P. R. Smirnov
Krestov Institute of Solution Chemistry
Author for correspondence.
Email: prs@isuct.ru
Russian Federation, Ivanovo, 153000
O. V. Grechin
Research Institute of Thermodynamics and Kinetics of Chemical Processes
Email: prs@isuct.ru
Russian Federation, Ivanovo, 153000