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On the nature of Berthierite

Published online by Cambridge University Press:  14 March 2018

F. L. Stillwell
F. L. Stillwell*
Affiliation:
Department of Geology, University of Melbourne
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Extract

Six analyses of berthierite from various localities are quoted by Dana and show a varying composition. The analyses correspond approximately to the formulae FeS.Sb2S3, 3FeS.2Sb2S3, and 3FeS.4Sb2S3. It is considered by Dana that the variation is probably due to the impurity of the analysed material and that the composition of berthierite is probably FeS. Sb2S3. This view is supported by the examination and analysis of a specimen of berthierite from Xullarnanna, 18 miles north of Inverell, Now South Wales.

The specimen was kindly lent by Mr. G. W. Card, Curator of the Mining Museum, Sydney, for comparison with certain minerals under investigation, and measured approximately l x l x O-7 cm. It was sliced and one portion was polished for examination under the reflecting microscope while the other portion was used for the chemical analysis.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 21 , Issue 114 , September 1926 , pp. 83 - 86
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1926

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References

page 83 note 1 Dana, System of Mineralogy, 6th edit., 1892, p. 115.

page 84 note 1 J. Murdoch, Microscopical determination of the opaque minerals, 1916, p. 103.

page 84 note 2 W. M. Davy and C. M. Farnham, Microscopic examination of the ore minerals, 1920, p. 117.