Internal Cation Mobilities in the Molten Binary Systems (Li, Na)Cl and (Na, K)Cl

Abstract

Abstract Internal mobility ratios of the two cations in the molten binary systems (Li, Na)Cl and (Na, K)Cl have been measured with Klemm's column method. From these and available data on the densities and conductivities the internal mobilities bLi , bNa and bK have been calculated. In (Li, Na)Cl, bLi is smaller than bNa in the investigated composition and temperature range, and in (Na, K)Cl, the Chemla effect occurs, that is a crossing of the isotherms is observed. The internal cation mobilities bM are well expressed by the empirical relation bM = [A/(V-V0)]exp(-E/RT), where A, E and V0 are constants depending on the cation M and V is the molar volume of the mixture.