A structural model for magnesium chloride-containing melts

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Abstract
A structural model for MgCl2-containing melts has been developed, based upon the assumption of MgCl42− complex anions. For the five MgCl2 – alkali chloride and for the MgCl2–AgCl systems, the model gives quantitative, or nearly quantitative, agreement to the experimental enthalpies of mixing in all six systems; to the partial entropies of mixing of alkali chloride in the four systems for which data are available; and to both sides of the phase diagrams in the three systems for which data are available. This is accomplished with the use of only one adjustable parameter for each system, and one other adjustable parameter for all the systems taken together. The same model also quantitatively accounts for the enthalpies of mixing in the five NiCl2 – alkali chloride systems.

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