Abstract

Activity coefficients for sodium metal in the equimolar CuTe alloy were measured up to 54 at. % sodium at 913 K. The experimental technique consisted of an alloy concentration cell with a solid alumina electrolyte. The results indicated that the solutions were Henrian up to 1 at. % sodium. In addition, for dilute sodium concentrations, there is an exosolution effect. However, for the more concentrated solutions, there is some ionicity. Keywords: tellurides, thermodynamics, alkali metals.

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