Abstract
Densities, viscosities, and electrical conductivity of potassium nitrate + lithium nitrate + cadmium nitrate tetrahydrate melt systems were measured as functions of temperature (≈292.15 ≤ T/K ≤ 363.15) and at various compositions x. The temperature dependence of viscosity and conductivity has been described by the Vogel−Tammann−Fulcher (VTF) equation. Molar volume data were fitted to an equation similar to the VTF equation based on the free volume model. Viscosity isotherms, unlike electrical conductivity, exhibit both negative as well as positive deviation from linearity as a function of composition. Mixed alkali effect in electrical conductivity has been observed under the isoviscosity condition. The onset of the mixed alkali effect has been explained in terms of the anion polarization model and complex ion of cadmium.
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