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Pollucite

#24775
SOLD
Pollucite from Bennett quarry, Buckfield, Oxford Co., Maine, United States - 24775
Pollucite from Bennett quarry, Buckfield, Oxford Co., Maine, United States - 24775

Pollucite

#24775
Availability
Sold
Size
6 x 5 x 3 cm - Sm Cabinet 
Formula
Cs(Si2Al)O6·nH2O (RRUFF)
Locality
Bennett quarry, Buckfield, Oxford Co., Maine, United States
Tagged
pegmatite

Pink mass of pollucite. Pollucite is the only important cesium mineral found in pegmatites in such quantities to be minable. Tanco in Manitoba is a large pegmatite with huge masses of pollucite. It was also mined at the Tin Mountain pegmatite in South Dakota. Pollucite is the pegmatitic equivalent of analcime and leucite. All three form a solid solution series. According to Černý it is a late member of primary crystallization.

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 

Data courtesy of Webmineral.

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