Phase Equilibria and Thermodynamic Properties of Phases in the H2O–Gd(NO3)3 System

A. V. Dzuban; Дзубан А. В.; A. A. Novikov; Новиков А. А.; A. V. Nesterov; Нестеров А. В.; Sh. Qianchen; Цяньчэнь Ш.; N. A. Kovalenko; Коваленко Н. А.; I. A. Uspenskaya; Успенская И. А.

doi:10.31857/S0044457X22601419

Phase Equilibria and Thermodynamic Properties of Phases in the H2O–Gd(NO3)3 System

作者: Dzuban A.V.¹, Novikov A.A.¹^,2, Nesterov A.V.¹^,2, Qianchen S.², Kovalenko N.A.¹, Uspenskaya I.A.¹
隶属关系:
1. Faculty of Chemistry, Moscow State University
2. Faculty of Materials Science, Shenzhen MSU-BIT University
期: 卷 68, 编号 2 (2023)
页面: 248-255
栏目: ФИЗИКОХИМИЯ РАСТВОРОВ
URL: https://ogarev-online.ru/0044-457X/article/view/136469
DOI: https://doi.org/10.31857/S0044457X22601419
EDN: https://elibrary.ru/LPCEXU
ID: 136469

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详细

Solid–liquid equilibria in the system H2O–Gd(NO3)3 were measured from –20 to 70°C using the isothermal saturation method. The Pitzer–Simonson–Clegg thermodynamic model was implemented to obtain the temperature dependence of Gd(NO3)3⋅6H2O solubility constant, to calculate salt solubility and to construct a phase diagram of the system from eutectic point to hydrate melting. Thermochemical properties of gadolinium nitrate aqueous solutions, such as dilution enthalpies and heat capacities, were assessed also. The model has shown to be reliable for phase equilibria calculation from –35 to 90°C and from 0 up to ~15 mol % of salt as well as the thermodynamic properties of Gd(NO3)3 aqueous solutions at room temperature and around it.

关键词

solubility, electrolyte solutions, gadolinium nitrate, thermodynamic modeling, Pitzer–Simonson–Clegg model

参考

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