Thermodynamic assessment of the Gd-Sb system

A thermodynamic assessment of the binary Gd-Sb system was performed through the CALPHAD approach (CALculation of PHAse Diagram) based on the evaluation of all phase diagram data and available thermodynamic data in the literature. The liquid, hcp-A3 (αGd) and bcc-A2 (βGd) phases were described by a substitutional solution model. All the intermediate phases, Gd5Sb3, Gd4Sb3, βGdSb, αGdSb and Gd16Sb39, were treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters of the Gd-Sb system has been obtained. A good agreement is obtained between the experimental and the calculated phase diagrams.