Thermodynamic descriptions for the various phases in the binary Al-Mg
are presented. These descriptions were obtained by optimization using
the thermodynamic and phase equilibrium data available in the literatu
re. The calculated phase diagram of Al-Mg using these thermodynamic de
scriptions is in excellent agreement with experimental phase equilibri
um data reported in the literature. In comparison to earlier evaluatio
ns of Al-Mg, we use considerably less model parameters. Yet, the model
-calculated thermodynamic values and phase diagram are in good, if not
better, agreement with experimental data than those obtained using pr
evious descriptions.