tahedral mica components in the phengite are ascribed to crystakhemical . 7 and 27Vo of CaAlSiO4F. Keywords: phengite-3T, celadonite-rich muscovite, granitic .. 70t-729. NewroN, R.C. & Hesrr.roll, H.T. (1981): Ther- modynamics of the.
Results of the phengite geobarometers show that peak pressures were in the . In contrast, Si-‐in-‐phengite barometry of the felsic gneiss yielded estimated.
Phengite is an aluminous true mica which contains a relatively high amount of tetrahedrally co-ordinated Si (>3.1 apfu). As the Si amount increases, .
Jan 12, 1970 . INTRODUCTION. THE NATURE of illite as a monomineral phase has been recently discussed by Gaudette, Eades and Grim (1966).
Phengite is a series name for dioctahedral micas of composition K(AlMg)2(OH)2(SiAl)4O10, similar to muscovite but with addition of magnesium. It is a non-IMA.
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