The Regular Solution Model for Stoichiometric Phases and Ionic Melts.

Abstract

The regular solution model is developed for ionic melts and stoichiometric phases of the type (A,B)_a (C,D)_c by a formal method. The validity of Flood's equation for exchange reactions in ionic melts is discussed in terms of this model. The model is also applied to phases which contain one substitutional and one interstitial solute. The vacancies in the interstitial sublattice is then regarded as an additional component of the system. Expressions for the integral and partial free energies are derived.