Collect. Czech. Chem. Commun.
1983, 48, 2437-2445
https://doi.org/10.1135/cccc19832437
Possibility of predicting the existence of a complex compound in the NaF-Na2SO4 system
Milan Malinovskýa and Jaroslava Vrbenskáb
a Department of Inorganic Technology, Slovak Institute of Technology, 812 37 Bratislava
b Department of Electrotechnology, Slovak Institute of Technology, 812 37 Bratislava
Abstract
A method of thermodynamic prediction of the existence of a complex compound in the NaF-Na2SO4 binary system is described. On the basis of the knowledge of a part of liquids drawn in the vicinity of NaF melting point and coordinates of eutectic point, the conclusion was made that there exists the complex compound Na3FSO4 in the system. Its true and hypothetic melting points and the degree of its thermal dissociation were calculated. Further, the probable coordinates of a eutectic point in the Na3FSO4-Na2SO4 subsystem were found out. The calculated results were confronted with experimental determination; the agreement is very good. The method described can be useful for experimental studies of binary phase diagrams.
