The Stability and Natural Occurrence of Margarite

Bruce Velde
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.

Mineralogical Magazine; September 1971 v. 38; no. 295; p. 317-323; DOI: 10.1180/minmag.1971.038.295.05
© 1971, The Mineralogical Society
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