Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Table 4

Enthalpy and entropy of formation of the Mg-Al intermetallic compounds.

Compound	Enthalpy of formation (kJ/mole·atom)	Entropy of formation (J/mole·atom·K)	Reference
Al30Mg23 (𝜀)	−3.42		[101] Cal. (F.P.)
	−0.99	3.27	[104] Cal. (Calphad)
Al140Mg89 (𝛽)	−2.47		[138] Exp.
	−1.22		[139] Exp.
	−1.08	2.95	[104] Cal. (Calphad)
Al12Mg17 (𝛾)	−3.80		[138] Exp.
	−1.01		[139] Exp.
	−3.60		[101] Cal. (F.P.)