Study of thermodynamic properties of europium-magnesium alloy system

The pressure of saturated steam above the Eu-Mg alloys of eight compositions containing 0.196-0.945 atomic fractions of Mg in the temperature interval 953-1003 K is investigated by the method of flux. The values of thermodynamic activity of Mg and Eu, their partial-molar and integral Gibbs energies, enthalpy and entropy of liquid alloys and of EuMg2 compound formation are calculated. It is supposed that the atomic 5d1-electrons of lanthanoids do not participate in the coupling with magnesium, or their energy contribution to this coupling is negligible