Classification of phase diagrams for alkali halide mixtures and the generalized Lindemann criterion

Thorough analysis of experimental data (the authors' own as well as those from the literature) on alkali halides and their mixtures with a view to application of a generalized Lindemann criterion for melting is presented. The result of a fitting procedure is ionic radii to be used in phase diagram calculations. It is shown that a successful choice of the radii allows one to predict new phase diagrams reliably. The authors' criterion of miscibility was used to finalize the choice.