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Thermodynamics of the solid Ni-S system

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Abstract

Published measurements of sulfur vapor pressure were used to determine thermodynamic properties of the solid Ni-S system above 800 K. They were Gibbs-Duhem integrated to estimate the formation properties of stoichiometric Ni3S2, NiS, and NiS2. Statistical thermodynamics was applied to find partition functions, interaction energies, and free energies to find possible atom arrangements in Ni3±x S2 and Ni1−x S. Theoretical calculations indicated that nickel vacancies may exist in quasichemical order in the former phase and randomly in the latter phase. A strong indication was that Ni3±x S2 should have a sulfur bcc structure with nickel atoms distributed in octahedral sites having a Ni5S4 configuration. The possible existence of sulfur vacancies was theoretically investigated.

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  1. Tokyo Institute of Technology, Meguro-ku, 152-8550, Tokyo, Japan

    Minoru Arita (Research Assistant)

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  1. Minoru Arita
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Arita, M. Thermodynamics of the solid Ni-S system. Metall Mater Trans A 37, 3009–3022 (2006). https://doi.org/10.1007/s11661-006-0182-z

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  • DOI: https://doi.org/10.1007/s11661-006-0182-z

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