Standard enthalpies of formation of selected Rh2YZ Heusler compounds

JOURNAL OF ALLOYS AND COMPOUNDS

卷:650

Article

Yin, Ming¹  Nash, Philip¹ 

[1] IIT, Thermal Proc Technol Ctr, Chicago, IL 60616 USA

关键词: Heusler compound;    Standard enthalpy of formation;    Calorimetry;   

DOI  :  10.1016/j.jallcom.2015.08.054

来源: Elsevier

【 摘 要 】

The standard enthalpies of formation (Delta H-f degrees) of selected ternary Rh-based Rh(2)YZ (Y - Cu, Fe, Mn, Ni, Ru, Ti, V; Z = Al, Ga, In, Si, Ge, Sn) compounds were measured using high temperature direct reaction calorimetry. The measured standard enthalpies of formation (in kJ/mol of atoms) are, for the Heusler compound Rh2MnSn (-40.1 +/- 3.6), for the B2-structured compounds: Rh2FeAl (-48.5 +/- 2.9); Rh2MnAl (-72.4 +/- 2.7); Rh2MnGa (-55.3 +/- 2.0); Rh2MnIn (-35.3 +/- 1.9), for the tetragonal compounds: Rh2FeSn (-28.9 +/- 1.3); Rh2TiAl (-97.6 +/- 2.2); Rh2TiGa (-79.0 +/- 1.8); Rh2TiSn (-74.7 +/- 3.1). Values are compared with those from first principles calculations in published papers and the Open Quantum Materials Database (OQMD). Lattice parameters of these compounds are determined using X-ray diffraction analysis (XRD). Microstructures were characterized using scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Published by Elsevier B.V.

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