Enthalpies of Formation of La <inf>2</inf> Intermetallics Derived from Heats of Reordering

A. R. Yavari, S. Gialanella, M. D. Baro, G. Le Caer

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A new method is proposed for estimating the enthalpies of formation of L1 2 (fcc-ordered) intermetallics from the heat release measured during ordering of their disordered polymorphs. The method is applied to Cu 3 Au, Ni 3 Al, and Ni 3 Si. The resulting estimates of enthalpies of formation are close to values obtained by high temperature dissolution calorimetry. They also appear to be more precise than estimates based on Miedema's correlations provided that care is taken to account properly for the magnetic and lattice stability contributions to the formation enthalpies in the ordered and disordered states. © 1997 The American Physical Society.
Idioma originalEnglish
Pàgines (de-a)4954-4957
RevistaPhysical Review Letters
Estat de la publicacióPublicada - 10 de nov. 1997

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