Journal of the Mineralogical Society of Korea (한국광물학회지)
- Volume 3 Issue 2
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- Pages.65-71
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- 1990
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- 1225-309X(pISSN)
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- 2288-7172(eISSN)
Chemical Composition and Thermal Changes of Natural Pyrrhotite
- Moon-Young Kim (Korea Institute of Energy and Resources) ;
- Hong-Ja Shin (Korea Institute of Energy and Resources))
- Published : 1990.12.01
Abstract
Compositions and thermal changes of pyrrhotites from Ohtani and Uljin mines were examined by Arnold's method and DTA analysis. The results are as follow: 1) The compositions of hexagonal type pyrrhotite are in some range from 47.23-47.42 atom.% Fe in the Ohtani mine, and 47.40-47.64 atom.% Fe in the Uljin mine. 2) The compositions of hexagonal pyrrhotite with exsoluted lamellae of monoclinic pyrrhotite are in 47.35-47.50 atom.% Fe in the Ohtani mine, and 47.15-47.40 atom.% Fe in the Uljin mine. This fact does not agree with phase diagrams of Fe-S system shown by Nakazawa and Morimoto(1970) and Sugaki and Shima(1977). 3) DTA data show two endothermic peak corresponding to
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