Superambient Heat Capacities of Synthetic Stibnite, Berthierite, and Chalcostibite: Revised Thermodynamic Properties and Implications for Phase Equilibria

Authors

Robert R. Seal II, U.S. Geological Survey, 954 National Center, Reston, Virginia 20192, USAFollow
Richard A. Robie, USGS
Paul B. Barton Jr., USGS
Bruce Hemingway, USGS

Date of this Version

1992

Comments

Published in Economic Geology Vol. 87, 1992, pp. 1911-1918.

Abstract

Stibnite (Sb₂S₃), berthierite (FeSb₂S₄), and chalcostibite (CuSbS₂) are important antimony-bearing minerals. Stibnite is the main ore mineral of antimony and occurs as an important accessory in many epigenetic ore deposits, especially in later stages of deposition or in peripheral facies of mineralization. Berthierite is a common accessory mineral in antimony deposits. Its occurrence, particularly in gold-antimony deposits, has received considerable scientific attention. Furthermore, stibnite, berthierite, and chalcostibite represent important reference phases for understanding phase equilibria in more complex systems, such as those containing tetrahedrite-tennantite solid solutions.