The viscosity and electrical conductivity of single molten salts

Highlights: • A linear dependence of the specific and molar conductivities of molten salts on their molar volumes is established. • This dependence resembles that of the fluidity of molten salts. • The activation energy for the fluidity of molten salts is five times larger than that for the conductivity. In addition to the well-established Arrhenius-type temperature-dependence of the specific and molar conductivities of molten salts, it turns out that they also depend linearly on the molar volumes, in analogy with the behavior of their fluidities. Similar values of the molar volumes representing the immobilization of the ions result from both kinds of flow phenomena. However, the activation energy for the fluidity is some five times larger than for the conductivity.