Thermodynamic investigation of the (LiF + NaF + CaF sub(2 + LaF) sub(3)) system

In this work a thermodynamic assessment of the (LiF + NaF + CaF sub(2 + LaF) sub(3)) system is reported. For the thermodynamic modeling of the liquid phase, the classical polynomial model, and the modified quasi-chemical model were used in parallel and compared. The extrapolation to higher order sys...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2011-10, Vol.43 (10), p.1515-1524
Main Authors: Beilmann, M, Benes, O, Konings, RJM, Fanghaenel, Th
Format: Article
Language:English
Subjects:
Assessments
Calcium fluoride
Calorimetry
Extrapolation
Formalism
Liquid phases
Mathematical models
Thermodynamics
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Summary:In this work a thermodynamic assessment of the (LiF + NaF + CaF sub(2 + LaF) sub(3)) system is reported. For the thermodynamic modeling of the liquid phase, the classical polynomial model, and the modified quasi-chemical model were used in parallel and compared. The extrapolation to higher order systems was done according to the Toop mathematical formalism. Furthermore, differential-scanning calorimetry data of the ternary (LiF + CaF sub(2 + LaF) sub(3)), (NaF + CaF sub(2 + LaF) sub(3)), and the quaternary (LiF + NaF + CaF sub(2 + LaF) sub(3)) mixtures are presented. Good agreement between the experimental data and the thermodynamic assessment was obtained.
ISSN:0021-9614
DOI:10.1016/j.jct.2011.05.002