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Solubility of NaFcr in Water at Temperatures of 5‒443°C and the Thermodynamic Properties of F– and NaFaq.

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Title: Solubility of NaFcr in Water at Temperatures of 5‒443°C and the Thermodynamic Properties of F– and NaFaq.
Authors: Tarnopolskaia, M. E.1 (AUTHOR) mashatarnopolskaya@yandex.ru, Reukov, V. L.1 (AUTHOR), Akinfiev, N. N.1 (AUTHOR), Aranovich, L. Y.1 (AUTHOR), Zotov, A. V.1 (AUTHOR)
Source: Doklady Earth Sciences. Feb2025, Vol. 520 Issue 2, p1-5. 5p.
Subjects: Thermodynamics, Complex fluids, Water temperature, Databases, Solubility
Abstract: The solubility of NaFcr (villiaumite) in water has been experimentally determined for the first time in a wide range of temperatures T = 5‒443°C and pressures P = 1‒1000 bar. At high PT parameters, the solubility is 1.5‒4 times lower than the values predicted by the SUPCRT97 thermodynamic database. Within the HKF model, the thermodynamic properties of NaFaq were estimated and the HKF parameters of the basic ion F–, necessary for describing its properties in the region of elevated (>100°C) temperatures, were significantly refined. The obtained experimental data allow estimating the maximum possible level of the fluorine concentration in hydrothermal alkaline fluids, which is determined by the solubility of NaFcr. [ABSTRACT FROM AUTHOR]
Copyright of Doklady Earth Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The solubility of NaFcr (villiaumite) in water has been experimentally determined for the first time in a wide range of temperatures T = 5‒443°C and pressures P = 1‒1000 bar. At high PT parameters, the solubility is 1.5‒4 times lower than the values predicted by the SUPCRT97 thermodynamic database. Within the HKF model, the thermodynamic properties of NaFaq were estimated and the HKF parameters of the basic ion F–, necessary for describing its properties in the region of elevated (>100°C) temperatures, were significantly refined. The obtained experimental data allow estimating the maximum possible level of the fluorine concentration in hydrothermal alkaline fluids, which is determined by the solubility of NaFcr. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Doklady Earth Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S1028334X24605480
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        Text: English
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              Text: Feb2025
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