Establishment of Corresponding-state Principle in Molten Fluoroberyllates and Silicates and Its Application

For the complex ionic liquids of type AX–BX2 such as alkali fluoroberyllates or alkaline-earth silicates, the corresponding-state principle has been established quantitatively between the pairs, (i) LiF–BeF2 and MgO–SiO2, (ii) NaF–BeF2 and CaO–SiO2 and (iii) KF–BeF2 and BaO–SiO2, in their intermediate composition regions under the reduced absolute temperature scale. Experimental data on ionic packing density, viscosity coefficient, and equivalent conductivity have empirically been confirmed to have nearly the same values within experimental errors in the corresponding-state of the respective molten materials. A better understanding of molten silicates and other complex liquids may be obtained from the experiments on molten fluoroberyllates at low temperatures.