Heating Experiments on Gudmundite

A. Horrell Clark
Dept. of Geology, University College, London, W.C. 1

Summary: In the absence of published experimental data on phase equilibria in the ternary system Fe-Sb-S and on the stability relations of gudmundite (FeSbS) and berthierite (FeSb2S4) , some preliminary investigations on the upper stability limit of natural gudmundite are briefly described. On heating in vacuo, As-free gudmundite broke down between 269° and 288°C, an approximate upper stability limit of 280±10°C conforming to the stability relations of the associated phases.

Mineralogical Magazine; December 1966 v. 36; no. 276; p. 1123-1125; DOI: 10.1180/minmag.1966.036.276.07
© 1966, The Mineralogical Society
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