Abstract
The standard enthalpies of formation of some 3d transition metal gallides have been measured by high temperature direct synthesis calorimetry at 1373±2 K. The following results in kJ/mol of atoms are reported: Sc5Ga3 (−59.4±2.0); Ti2Ga (−39.0±1.4); V2Ga5 (−16.6±1.7); Cr3Ga (−11.8±1.8); FeGa3 (−24.8±2.1); CoGa3 (−29.4±2.2) and NiGa (−44.9±1.9). The results are compared with some earlier values obtained by solution calorimetry or derived from EMF measurements. They are also compared with predicted values from the semi-empirical model of de Boer et al. and with available enthalpies of formation for 3d transition metal aluminides and germanides.
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