Abstract
Experimental studies on the metastable solubilities and the physicochemical properties (density, pH value, conductivity, and viscosity) of the aqueous reciprocal quaternary system (LiCl + MgCl2 + Li2SO4 + MgSO4 + H2O) at 323.15 K were determined with the isothermal evaporation method. According to the experimental results, the dry-salt phase diagram, water-phase diagram, and the physicochemical properties versus composition diagram were plotted. It was found that there are four invariant points, nine metastable solubility isotherm curves, and six metastable crystallization fields corresponding to lithium chloride monohydrate (LiCl·H2O), bischofite (MgCl2·6H2O), starkeyite (MgSO4·4H2O), hexahydrite (MgSO4·6H2O), lithium sulfate monohydrate (Li2SO4·H2O), and the double salt lithium-carnallite (LiCl·MgCl2·7H2O). No solid solution was found. On the basis of the extended Harvie–Weare (HW) model and its temperature-dependent equation, the values of the Pitzer parameters β(0), β(1), β(2), and Co for Li2SO4, MgCl...
Published Version
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