Thermodynamic modeling of the AgNO sub(3)-CsNO sub(3)-NaNO sub(3) ternary system

By means of an optimization procedure, the AgNO sub(3)-CsNO sub(3)-NaNO sub(3) ternary system has been assessed. The mixing enthalpies in the ternary system and the results derived from thermodynamic descriptions for the three limiting binary systems are used. For the AgNO sub(3)-NaNO sub(3) and CsNO sub(3)-NaNO sub(3) systems, optimized Gibbs energy expressions were taken from the literature. An assessment of the binary AgNO sub(3)-CsNO sub(3) system based on the available experimental data is presented in this paper; the calculated phase diagram and thermodynamic functions agree well with experimental data. The parameters describing the Gibbs energies of all binary phases and the ternary liquid are used to predict the phase diagram of the AgNO sub(3)-CsNO sub(3)-NaNO sub(3) system.