Thermodynamic considerations of metal halide vapour complexes

Certain metal halide vapor complexes of the type ABX sub(m+n) increase the equilibrium vapor concentration of one or both of the component salts in the binary system (AX sub(m)/BX sub(n)). Such enhancement depends upon the free energy of complex formation, the saturated vapor pressure of the complexing salt and the melt activities, in a manner formulated here by means of a thermodynamic scheme. Certain trends in the periodic table are established.