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Phase Diagram of the System KBF4-KF-KCl

O. Patarák and V. Daněk

Institute of Inorganic Chemistry, Slovak Academy of Sciences, CS-842 36 Bratislava


Abstract: Using the thermal analysis method the phase diagram of the KBF4-KF-KCl system was determined. The system is a simple eutectic one with the coordinates of the eutectic point of 61.4 mole % KBF4, 19.4 mole % KF, 19.2 mole % KCl and the temperature of the eutectic crystallization of 422°C. The dependence of the excess Gibbs energy of mixing on the composition was calculated using the theory of regular solutions. From the analysis of this property it follows that a significant ternary interaction of all present anions takes place, most probably due to the exchange substitution of fluorine atoms in the complex fluoroborate anion by chlorine ones.

Full paper in Portable Document Format: 462a91.pdf


Chemical Papers 46 (2) 91–94 (1992)

Monday, June 17, 2024

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