Abstract
All phase equilibria and thermodynamic data available in the literature on the copper sulfides high- and low-temperature chalcocite, djurleite and anilite have been critically analyzed for optimization of the solid-state phase diagram of the Cu-S system at 1 bar total pressure. A two-sublattice approach derived from a recently developed Gibbs energy model for digenite enables the consideration of the solid solution nature of both modifications of chalcocite and for the first time of djurleite. Anilite is considered as stoichiometric compound. The sulfur solubility of metallic copper is described by a substitutional approach. The obtained Gibbs energy functions for high- and low-temperature chalcocite, djurleite, anilite and copper alloy phase allow computations and predictions of phase equilibria and thermodynamic properties in good accordance with experimental data of the Cu-S solid-state system.
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Waldner, P. Solid-State Phase Equilibria of the Cu-S System: Thermodynamic Modeling. J. Phase Equilib. Diffus. 39, 810–819 (2018). https://doi.org/10.1007/s11669-018-0670-z
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DOI: https://doi.org/10.1007/s11669-018-0670-z