Solubilities of Zinc Oxide and Cadmium Oxide
in KClLiCl Eutectic Melts

V. L. Cherginets and T. P. Rebrova

Institute of Scintillation Materials, National Academy of Sciences of Ukraine, Kharkov, Ukraine

Received January 25, 2005

Abstract—ZnO solubility (pP = 4.77 0.1) and CdO solubility (pP = 1.46 0.1) in KCl–LiCl melts at 700°C
are determined using the sequential additions method with the potentiometric control of the equilibrium oxide
ion concentration. Cadmium oxide is a strong base; it fully dissociates in unsaturated solutions. Zinc oxide is a
weak base (pK_ZnO = 2.89 0.15). As the acidic properties of an ionic solvent strengthen with a fixed anionic
composition, the solubilities of the oxides increase in correlation with their basicity index; the surface energy
at the interface between the solid oxide and ionic melt decreases in association.

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