Mineralpedia Details for Pollucite
Pollucite
- Formula
- Cs(Si2Al)O6·nH2O
- Crystal System
- Isometric
- Crystal Habit
- Massive
- Cleavage
- None, None, None
- Luster
- Vitreous - Dull
- Color
- colorless, white, gray, pale pink, blue
- Streak
- white
- Class
- Isometric - Hexoctahedral
- Fracture
- Brittle - Uneven
- Hardness
- 6.5
- WebMineral
- View Pollucite
- Mindat
- View Pollucite
Pollucite from Skardu dist., Balistan, Northern Areas, Pakistan
A large mass of olorless, crystalline Pollucite.
Pollucite from Tanco pegmatite, Bernic Lake, Manitoba, Canada
Colorless to white crystalline mass of Pollucite from the largest Pollucite deposit known.
Pollucite from Buckfield, Oxford Co., Maine, United States
A white to colorless crystalline mass. Maine pegmatites are granitic LCT-type (Lithium-cesium-tantalum), that is rich in these elements which form minerals such as this one, Pollucite.
Dr. Van King wrote an tremendously informative article for Rocks and Minerls Nov/Dec 1987 in which he describes general pegmatite geology but also Maine pegmatite characteristics. King also wrote a book called "A Collector's Guide to Granitic Pegmatites", an excellent introduction to pegmatites.
Ex. Cooke specimen, acquired through Dakota Matrix and then by Bill McConlogue.
Cerny, one of our foremost pegmatite experts, in 1982 contributed papers to the Min. Assoc. of Canada Short Course on Granitic Pegmatites. He describes the occurence of Pollucite in pegmatites as originating as a primary contituent from residual fluids or as a late stage metasomatic product. Very few granitic pegmatites as a percent contain Pollucite. The largest deposit is Tanco in Manitoba.
