-
Phengite is a
series name for
dioctahedral micas of
composition K(Al,Mg)2(OH)2(Si,Al)4O10. It is
common for Mg or Fe2+ to
substitute for Al on the Y site...
-
minerals include kyanite, rutile, quartz, lawsonite, coesite, amphibole,
phengite, paragonite, zoisite, dolomite,
corundum and, rarely, diamond. The chemistry...
-
epidote ±
phengite ± paragonite,
omphacite In metagreywackes:
quartz +
jadeite +
lawsonite ±
phengite, glaucophane,
chlorite In metapelites:
phengite + paragonite...
- muscovite)
Mariposite – K(Al,Cr)2(Al,Si)4O10(OH)2 (Cr-bearing muscovite)
Phengite – KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 (Fe/Mg-bearing muscovite) Paragonite...
- Europe. It is not an
officially classified mineral, but is a chromium-rich
phengite,
which is a high
silica variety of muscovite. It is the
chromium that gives...
- columbite-(Mn))
Manganotantalite (synonym of tantalite-(Mn))
Mariposite (variety of
phengite/muscovite)
Meerschaum (variety of sepiolite)
Melanite (variety of andradite)...
- the
chlorite is destro**** by
reactions with
either pot****ium
feldspar or
phengite mica
which produce biotite, muscovite, and quartz. At
still higher temperatures...
- or
phengite +/-
albite +/-
quartz +/- talc +/-
garnet Granites:
kyanite +/-
paragonite +/-
chlorite +/-
albite +/-
quartz +/-
pargasite or
phengite Calc-silicates:...
-
Quartzite Metamorphic rock Quartzite,
containing darker bands of
phengite and chlorite, from
Maurienne Valley in the
French Alps
Composition Quartz Physical...
- iron
replaces some of the
aluminium to
maintain charge balance, is
called phengite. Chromium-rich and vanadium-rich
muscovite are
known respectively as fuchsite...
