Abstract
Tin solution calorimetry has been used to measure the enthalpies of formation of the solid phases of the nickel-gallium system at 300 K and of the nickel-germanium system at 330 K. Values are reported for the two nickel-rich binary solid solutions and for the intermediate phases Ni3Ga, Ni2Ga, Ni3Ga2, NiGa, Ni2Ga3, Ni3Ga7, Ni3Ge, Ni2Ge and NiGe. These and previously determined enthalpies of formation of related palladium alloy compounds are compared and factors affecting the bonding mechanisms are discussed; a dependence of intercomponent transfer upon electron concentration and electronegativity differences is suggested by a re-examination of the intermediate phase data.
Published Version
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