Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Table 30

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

Compound	Enthalpy of formation (kJ/mole·atom)	Entropy of formation (J/mole·atom·K)	Reference
Mg2Cu	−9.54	−0.01	[66] Cal. (Calphad)
	−5.58±2.51	9.49±5.02	[76] Exp.
	−10.63±1.09	−1.49±1.38	[123] Exp.
	−9.55±0.42		[77] Exp.
	−9.8±1.8		[16] Exp.
MgCu2	−12.56	0.0	[66] Cal. (Calphad)
	−7.5±1.53	3.91±2.09	[76] Exp.
	−12.85±0.67	0.42±0.84	[123] Exp.
	−11.18±0.42		[77] Exp.
	−4.75		[71] Cal. (F.P.)
	−12.7±2.0		[16] Exp.