A new type of nonvariant points in multicomponent solubility diagrams by the example of the Na+, Ni2+// Cl–, SO42–– H2O system
- Authors: Charykov N.A.1,2,3, Subbotin D.I.2, Keskinov V.A.1, Semenov K.N.4, Gurieva A.A.2, German V.P.2, Rostokin A.A.2
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Affiliations:
- D. Serikbayev East Kazakhstan Technical University
- St. Petersburg State Technological Institute (Technical University)
- St. Petersburg State Electrotechnical University “LETI”
- I. P. Pavlov First St. Petersburg State Medical University
- Issue: Vol 99, No 5 (2025)
- Pages: 725-731
- Section: PHYSICAL CHEMISTRY OF SOLUTIONS
- Submitted: 02.09.2025
- Published: 15.12.2025
- URL: https://journals.rcsi.science/0044-4537/article/view/307548
- DOI: https://doi.org/10.31857/S0044453725050062
- EDN: https://elibrary.ru/hewvhp
- ID: 307548
Cite item
Abstract
Existence of a new type of nonvariantpoints on isotherm-isobaric solubility diagrams of multicomponent systems is described.Realization of such nonvariant points is directly related to crystallizationof solid phases based on pure solvents at temperatures belowthe crystallization temperatures of the latter in single-component systems. Atype of nonvariant processes occurring at these points during isothermalevaporation of the solvent and stability of monovariant equilibria inthe nearest neighborhood of nonvariant points are considered. Characteristic examplesof realization of such nonvariant equilibria are presented by theexample of three- and four-component (mutual) water-salt systems.
About the authors
N. A. Charykov
D. Serikbayev East Kazakhstan Technical University; St. Petersburg State Technological Institute (Technical University); St. Petersburg State Electrotechnical University “LETI”
Email: keskinov@mail.ru
Ust-Kamennogorsk, 070000 Kazakhstan; St. Petersburg, 190013 Russia; St. Petersburg, 197376 Russia
D. I. Subbotin
St. Petersburg State Technological Institute (Technical University)
Email: keskinov@mail.ru
St. Petersburg, 190013 Russia
V. A. Keskinov
D. Serikbayev East Kazakhstan Technical University
Email: keskinov@mail.ru
Ust-Kamennogorsk, 070000 Kazakhstan
K. N. Semenov
I. P. Pavlov First St. Petersburg State Medical University
Email: keskinov@mail.ru
St. Petersburg, 197022 Russia
A. A. Gurieva
St. Petersburg State Technological Institute (Technical University)
Email: keskinov@mail.ru
St. Petersburg, 190013 Russia
V. P. German
St. Petersburg State Technological Institute (Technical University)
Email: keskinov@mail.ru
St. Petersburg, 190013 Russia
A. A. Rostokin
St. Petersburg State Technological Institute (Technical University)
Author for correspondence.
Email: keskinov@mail.ru
St. Petersburg, 190013 Russia
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