Phengite is a series name for dioctahedral
micas of composition K(AlMg)
2(OH)
2(SiAl)
4O
10, similar to
muscovite but with addition of
magnesium.
References
- Glossary of Geology, Fifth Edition, Eds. K.K.E. Neiendorf, J.P. Mehl, J.A. Jackson, American Geological Institute, 2005
External links
- http://www.mindat.org/min-3189.html