Please remember that pyrite/marcasite (FeS2) are not the only iron
sulphides there are a vaste number of pyrrhotites of different
compositions from troilite FeS to FeS1+x Fe10S11 for example.
R.A.Ixer
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Dr R. A. Ixer
School of Earth Sciences Email: [log in to unmask]
University of Birmingham Tel: 0121 414 4179
Edgbaston Fax : 0121 414 3971
Birmingham B15 2TT
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