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Experimental and calculated enthalpies of formation of rare earth-tin alloys

Identifieur interne : 001484 ( Istex/Curation ); précédent : 001483; suivant : 001485

Experimental and calculated enthalpies of formation of rare earth-tin alloys

Auteurs : C. Colinet ; A. Pasturel ; A. Percheron-Guégan [France] ; J. C. Achard [France]

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RBID : ISTEX:5DF743F579B1C4593D8A3EB56FE987A26D28F4FF

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English descriptors

Abstract

Abstract: The partial enthalpies of some rare earth elements (lanthanum, cerium, thulium, lutetium and yttrium) at infinite dilution in liquid tin were determined by means of a calorimetric method. The change in this thermodynamic property with atomic number is discussed in terms of the contribution of the 4f electrons to the bonding. This assumption is used to calculate the hybridization term involved in Miedema's relation. Experimental results therefore allow an accurate determination of the parameters of Miedema's relation. These are used to calculate the enthalpies of formation of rare earth-tin compounds. The predicted values are compared with available experimental data.

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DOI: 10.1016/0022-5088(84)90313-8

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ISTEX:5DF743F579B1C4593D8A3EB56FE987A26D28F4FF

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C. Colinet
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A. Pasturel
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<div type="abstract" xml:lang="en">Abstract: The partial enthalpies of some rare earth elements (lanthanum, cerium, thulium, lutetium and yttrium) at infinite dilution in liquid tin were determined by means of a calorimetric method. The change in this thermodynamic property with atomic number is discussed in terms of the contribution of the 4f electrons to the bonding. This assumption is used to calculate the hybridization term involved in Miedema's relation. Experimental results therefore allow an accurate determination of the parameters of Miedema's relation. These are used to calculate the enthalpies of formation of rare earth-tin compounds. The predicted values are compared with available experimental data.</div>
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