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Phase Equilibria in the NaF–NaCl–NaBr–Na2CrO4 System

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Inorganic Materials Aims and scope

Abstract—

We have studied phase equilibria in the quaternary system NaF–NaCl–NaBr–Na2CrO4. The results demonstrate that the continuous series of NaClxBr1 – x solid solutions persists in the system. The chemical composition and melting point (507°C) of a mixture with the composition corresponding to the quaternary minimum have been determined by differential thermal analysis, and its enthalpy of fusion (232 J/g) has been determined by differential scanning calorimetry. Its phase composition has been confirmed by X-ray diffraction. Theoretical and experimental techniques have been used to identify phase equilibria and the phase crystallization sequence and construct a 3D computer model of phase relations, which makes it possible to predict phase transformations for arbitrary representative points in the system studied.

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Authors and Affiliations

  1. Institute for Geothermal Research and Renewable Energy Sources, Joint Institute for High Temperatures (Makhachkala Branch), Russian Academy of Sciences, 367030, Makhachkala, Dagestan, Russia

    N. N. Verdiev, Z. N. Verdieva, A. B. Alkhasov & P. A. Musaeva

  2. Dagestan State University, 367000, Makhachkala, Dagestan, Russia

    N. N. Verdiev

  3. Samara State Technical University, 443100, Samara, Russia

    I. K. Garkushin, A. V. Burchakov, I. M. Kondratyuk & E. M. Egorova

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  1. N. N. Verdiev
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  2. I. K. Garkushin
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  3. A. V. Burchakov
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  4. Z. N. Verdieva
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  5. A. B. Alkhasov
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  6. P. A. Musaeva
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  7. I. M. Kondratyuk
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  8. E. M. Egorova
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Correspondence to N. N. Verdiev.

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Translated by O. Tsarev

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Verdiev, N.N., Garkushin, I.K., Burchakov, A.V. et al. Phase Equilibria in the NaF–NaCl–NaBr–Na2CrO4 System. Inorg Mater 56, 1179–1187 (2020). https://doi.org/10.1134/S0020168520110151

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