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Thermochemical study of the system Fe-As-S

Geochimica et Cosmochimica Acta

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Abstract

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 (Wagman et al., 1965). Data are also presented for the covariation of activity of S2(g) with temperature and composition of the sulfur-arsenic liquid. ?? 1969.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Thermochemical study of the system Fe-As-S
Series title:
Geochimica et Cosmochimica Acta
Volume
33
Issue:
7
Year Published:
1969
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geochimica et Cosmochimica Acta
First page:
841
Last page:
857