Thermodynamic assessment of the Ga–Pt system

The Ga–Pt binary system has been thermodynamically assessed by means of the computer program Thermo-Calc. The Redlich-Kister polynomial was used to describe the solution phases, liquid (L) and fcc (Pt). The compounds, Ga6Pt, Ga7Pt3, Ga2Pt, Ga3Pt2, GaPt, Ga3Pt5 and GaPt2, were treated as stoichiometric phases. The sublattice-compound energy model was employed to describe the compound GaPt3, with a homogeneity range. The parameters of the Gibbs energy expressions were optimized according to all the available experimental information of both the equilibrium data and the thermodynamic results. A set of self-consistent thermodynamic parameters of the Ga–Pt system has been obtained. The calculations agree well with the respective experimental data.