Abstract

The temperature dependent and concentration asymmetric interaction parameter in the liquid phase region is computed from reliable thermodynamic data and phase-boundary composition by treating the single liquid phase of Cs–Te as a sub-regular solution. The excess Gibbs energy of the liquid phase of Cs–Te is determined to be G L E =x Cs ×x Te {(−289−0.00144× T) x Te +(−972+0.482713×T) x Cs } kJ/mol in the temperature range 900–1100 K. The interaction parameter so deduced is used to calculate the activities of Te and Cs in the single liquid phase and two-phase regions around Cs 2Te.

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