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Some topaz-, sillimanite-, and kyanite-bearing rocks from Tanzania

Published online by Cambridge University Press:  14 March 2018

D. R. C. Kempe
D. R. C. Kempe*
Affiliation:
Department of Mineralogy, British Museum (Natural History)
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Summary

Some sillimanite-kyanite quartzites, which may grade into sillimanite-kyanite topazfels, from NE. Tanzania are described. In view of the suggestion that a solid-solution series might exist between topaz and sillimanite, the cell dimensions and some optical properties of both minerals were investigated. No abnormal results, suggesting solid solution, were obtained and the coexistence of topaz, sillimanite, and kyanite is ascribed to particular physico-chemical conditions.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 280 , December 1967 , pp. 515 - 521
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1967

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