Abstract

The standard enthalpies of formation of aluminides in the binary systems La-Al, Hf-Al, Ta-Al, W-Al, Re-Al and Pt-Al were determined by direct synthesis calorimetry at 1473 ± 2 K. The results are compared with earlier experimental data and with predicted values from Miedema's semi-empirical model. In systematic plots the enthalpies of formation of 5d aluminides are compared with similar data for the 3d and 4d aluminides, and with enthalpy data for the 5d borides, germanides and silicides.

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