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The stability and natural occurrence of margarite

Published online by Cambridge University Press:  05 July 2018

Bruce Velde*
Affiliation:
Laboratoire de Pétrographie, Faculté des Sciences de Paris, 9 quai Saint Bernard, Paris 5

Summary

The upper stability of margarite has been determined to be 450 °C at 1 kb and 530 °C at 2 kb total pressure (PH2O = Ptotal). Other experiments delimit in a general way the lower stability of this mineral and its paragenesis in more SiO2 rich compositions. The presence of the 060 reflection at 1·475 Å can be used to distinguish between margarite and paragonite or muscovite.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1971

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