Standard enthalpies of formation of some 5d transition metal gallides by high-temperature direct synthesis calorimetry

Autor:	O. J. Kleppa, S.V. Meschel
Rok vydání:	2000
Předmět:	Materials science Mechanical Engineering Enthalpy Metals and Alloys Calorimetry EMF measurement Heat capacity Chemical synthesis Standard enthalpy of formation Transition metal Mechanics of Materials Materials Chemistry Physical chemistry Standard enthalpy change of formation
Zdroj:	Journal of Alloys and Compounds. 311:241-247
ISSN:	0925-8388
DOI:	10.1016/s0925-8388(00)01113-0
Popis:	The standard enthalpies of formation of some 5d 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: LaGa 2 (−69.2±2.4); HfGa 3 (−42.4±2.7); Hf 5 Ga 3 (−45.4±2.1); Ta 5 Ga 3 (−28.3±2.2); OsGa 3 (−27.4±1.6); IrGa 3 (−41.2±1.9); IrGa (−43.3±1.8); Pt 3 Ga (−41.3±2.2); PtGa (−57.3±2.3). The results are compared with some earlier values obtained by solution calorimetry or derived from EMF measurements. They are also compared with the predicted values of Miedema and coworkers. We compare the enthalpies of formation of 3d, 4d and 5d transition metal gallides and the heats of formation of the 5d gallides with available values for the 5d transition metal aluminides and germanides.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f5befe50e105cdec7609f5c55822ba12 https://doi.org/10.1016/s0925-8388(00)01113-0 Zobrazit plný text záznamu Full Text from ScienceDirect