Systems consisting of an alkaline-earth metal and a halide and their thermodynamic properties

For systems consisting of an alkaline-earth metal and a halide, the dependence of the critical stratification temperature and the critical composition on the logarithm of the molecular mass of the halogen is established; this permits refinement of the fusibility diagrams of the Ca-CaF2 system. In addition, the fusibility diagrams of the SrF2-Sr and BaF2-Ba systems are predicted The parameters of particle reaction are determined from the equality of the chemical potentials of the components in the immiscibility region at the monotectic temperature for systems of Ca, Sr, and Ba with their fluorides; the excess Gibbs energies and activities of the components of the Ca-CaF2, Sr-SrF2, and Ba-BaF2 systems are calculated.