ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Method of evaluation of the phase diagram of a system with formation of a compound

I. Horsák and I. Sláma

Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague

Abstract:  The method for evaluation of phase diagrams of the systems with complete miscibility in liquid phase and forming a compound is proposed. A true equilibrium constant of the reaction leading to the formation of the compound is assumed. Further we assume a hypothetical phase diagram of a ternary system which arises from the both original components and the new formed compound. Section of such a ternary phase diagram presents the known binary phase diagram which can be determined experimentally. The values of the equilibrium constant and of the interaction parameters for excess Gibbs energy of the ternary system are optimized using a computer. The proposed method is illustrated on examples of experimental data published in literature for the following systems: sodium fluoride—sodium sulfate, potassium fluoride—potassium sulfate, calcium chloride—potassium chloride, and calcium bromide—rubidium bromide.

Full paper in Portable Document Format: 363a311.pdf

Chemical Papers 36 (3) 311–320 (1982)