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Contribution to the thermochemistry of rare earth pnictides: The Sm-Bi system

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Journal of Phase Equilibria

Abstract

Formation enthalpies of Sm-Bi alloys (in the complete range of compositions) and Er-Bi alloys (for a few compositions) have been measured using a direct, small-furnace, isoperibolic aneroid differential calorimeter. Typical values for the reaction in the solid state at 300 K are: Sm2Bi,−88 ± 3; Sm5Bi3, −94 ± 4; Sm4Bi3, −104 ± 2; SmBi, −108 ± 2; SmBi2, −76 ± 4; and ErBi, −90 ± 5 kJ/g-atom.

The experimental data are briefly discussed, compared with those of similar rare earth compounds, and found to be in good agreement with those computed according to the Miedema model and, for the rare earth-rich alloys, also with those calculated according to the Kubaschewski suggestion based on the so-called “effective coordination number” in alloys.

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Borzone, G., Parodi, N. & Ferro, R. Contribution to the thermochemistry of rare earth pnictides: The Sm-Bi system. JPE 14, 485–493 (1993). https://doi.org/10.1007/BF02671968

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