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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 recognized mineral name representing the series between muscovite and celadonite.〔(Mindat.org ) 〕〔(Mineralienatlas: Phengit ) 〕 The silica content of phengite has been proposed as a geobarometer for the metamorphism of low grade schists.〔 M. E. Fleet and R. A. Howie, ''Rock-Forming Minerals, Vol. 3A: Micas'', Geological Society of London; 2nd ed, 2006, p. 132, ISBN 1-86239-142-4 (accessed through Google books)〕 ==References== * Glossary of Geology, Fifth Edition, Eds. K.K.E. Neiendorf, J.P. Mehl, J.A. Jackson, American Geological Institute, 2005 * von Kobell, Franz (1853) Tafeln zur Bestimmung des Mineralien, 5th edition, Munchen. * Guidotti, Charles V. (1984) Micas in metamorphic Rocks, reviews in Mineralogy, 13: 357-467. * Rieder et al. (1998): Nomenclature of the micas. Canadian Mineralogist 36: 905-912. * Mookherjee, M., and Redfern, S.A.T. (2002) A high-pressure Fourier-transform infrared study of the interlayer and Si-O stretching region in phengite-2M 1. Clay Minerals: 37: 323-336. * Cibin, G., G. Cinque, A. Marcelli, A. Mottana, & R. Sassi (2008): The octahedral sheet of metamorphic 2M1-phengites: a combined EMPA and AXANES study: American Mineralogist 93, 414-425. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「phengite」の詳細全文を読む スポンサード リンク
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