Thermochemical study of the system Fe-As-S

Geochimica et Cosmochimica Acta



The results of Toulmin and Barton (1964) for the Fe-S system have been combined with a series of new measurements on As-bearing assemblages in the 500°–850°C temperature range to derive data on the free energies, enthalpies, and entropies of formation for arsenopyrite, loellingite, orpiment, realgar, FeAs, and Fe2As. The enthalpies and free energies of formation of orpiment and realgar are only approximately one-half as large as indicated in recent compilations of thermochemical data (Wagmanet al., 1965). Data are also presented for the covariation of activity of S2(g) with temperature and composition of the sulfur-arsenic liquid.

    Publication type Article
    Publication Subtype Journal Article
    Title Thermochemical study of the system Fe-As-S
    Series title Geochimica et Cosmochimica Acta
    DOI 10.1016/0016-7037(69)90031-3
    Volume 33
    Issue 7
    Year Published 1969
    Language English
    Publisher Elsevier
    Description 17 p.
    First page 841
    Last page 857
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