Magnesiocarpholite

magnesiocarpholite

chloritoid

pyrophyllite

paragonite

Images

Formula: MgAl2Si2O6(OH)4
Inosilicate (chain silicate), carpholite group, forms a series with ferrocarpholite
Specific gravity:
Hardness: 5 to 5½
Streak: White
Colour: Grey-green, white
Common impurities: Ti,Fe,Mn,Ca,Na,K,H2O,P
Environments

Metamorphic environments

Magnesiocarpholite is a high pressure, low temperature mineral occurring in blueschist facies metamorphic rocks (Webmin). Associated minerals include chloritoid, pyrophyllite, paragonite, muscovite, diaspore, chlorite, hematite and quartz (HOM).

Localities

At the type locality, Vanoise, Savoie, Auvergne-Rhône-Alpes, France, magnesiocarpholite occurs in veins and in schist, quartzite and metamorphosed bauxite formed during high pressure, low temperature metamorphism (HOM).

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