Internal cation mobilities in molten lithium - Potassium fluoride

Relative differences between internal cation mobilities in molten (Li, K) F have been measured by countercurrent electromigration (Klemm method) at 1023 K. Internal mobilities of K+ are larger than those of Li+ in all composition on which we have measured so far. More striking feature is that the isotherms have minimum of mobilities at ca. x(K) = 0.5. The local structural parameters would be highly related to the ionic conduction behavior in molten fluorides.