On thermodynamic assessment of the Ag-Pr system

Optimized descriptions of the phase diagram and thermodynamic properties of the Ag-Pr system have bern obtained from experimental thermodynamic and ph ase diagram data by means of the computer program THERMO-CALC based on the least squares method, using models for the Gibbs energy of individual phase s. The system contains four intermetallic compounds. The calculated standar d enthalpies of formation of AgPr, Ag2Pr, Ag51Pr14 and Ag5Pr are -23.580 kJ /mol, -22.132 kJ/mol, -21.246 kJ/mol and -21.393 kJ/mol, respectively. A co nsistent set of thermodynamic parameters was derived. Optimized and experim ental data are in good agreement. (C) 2000 Elsevier Science S.A. All rights reserved.