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An X-ray study on the crystal-structure of gümbelite

Published online by Cambridge University Press:  14 March 2018

Endel Aruja
Endel Aruja*
Affiliation:
King's College, Newcastle upon Tyne(University of Durham)
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Extract

Dana classifies gümbelite in the kaolin division under pyrophyllite, and expresses the view that it may be an impure pyrophyllite. The present study, however, has shown that the unit cell of gümbelite is very similar to that of muscovite. Also the chemical analysis reveals a Closer similarity to muscovite, particularly to a variety called hydromuscovite.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 27 , Issue 184 , March 1944 , pp. 11 - 15
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1944

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References

page 11 note 1 Dana, , Descriptive mineralogy, 6th edition, New York, 1892.Google Scholar

page 11 note 2 Timofeev, V. M., Trav. Soc. Nat. Leningrad, 1925, vol. 55, part 1, pp. 95–101. A description in English of the occurrence in the shungite deposit is given, with a map, in the XVII International Geological Congress guide-book ‘The Northern Excursion, The Karelian ASSR’, 1937, p. 55. See also V. M. Timofeev, The petrography of Karelia, 1935 [M.A. 7-197.]Google Scholar

page 13 note 1 Brammall, A., Leech, J. G. C., and Bannister, F. A., Min. Mag., 1937, vol. 24, pp. 507–520.CrossRefGoogle Scholar