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Thermodynamic Properties of Phases and Phase Equilibria in the H2O–HNO3–UO2(NO3)2–Th(NO3)4 System

  • THERMODYNAMICS OF INORGANIC COMPOUNDS
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Abstract

A set of Pitzer parameters was obtained to accurately describe the thermodynamic properties of solutions in the H2O–UO2(NO3)2–Th(NO3)4–HNO3 system at 25°С and represent the thermodynamic properties of liquid phases in the H2O–Th(NO3)4–HNO3 subsystem in the temperature range 25–50°С. Solubility products were calculated for crystal hydrates Th(NO3)4 · 6H2O and UO2(NO3)2 · 3H2O to predict the solubilities of these compounds in those solutions over a wide concentration range.

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Funding

This study was supported by the Russian Foundation for Basic Research (project no. 18-29-24167).

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Authors and Affiliations

  1. Moscow State University, 119991, Moscow, Russia

    A. S. Malyutin, N. A. Kovalenko & I. A. Uspenskaya

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  1. A. S. Malyutin
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  2. N. A. Kovalenko
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  3. I. A. Uspenskaya
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Correspondence to A. S. Malyutin.

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The authors declare that they have no conflicts of interest.

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Translated by O. Fedorova

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Malyutin, A.S., Kovalenko, N.A. & Uspenskaya, I.A. Thermodynamic Properties of Phases and Phase Equilibria in the H2O–HNO3–UO2(NO3)2–Th(NO3)4 System. Russ. J. Inorg. Chem. 65, 781–786 (2020). https://doi.org/10.1134/S0036023620050149

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