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A note on albite twinning in plagioclase felspars

Published online by Cambridge University Press:  14 March 2018

P. Gay
P. Gay*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
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Summary

Previous work by Donnay on the basis of the geometrical theory of twinning related the width of albite twin lamellae to the composition of the plagioclase. The curve derived by Donnay has been recalculated for both high- and low-temperature felspars from X-ray data; the two curves differ markedly in the region between 0 and 20 % An. Some experimental evidence in support of the deductions that can be made is given.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 235 , December 1956 , pp. 301 - 305
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1956

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References

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