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Montebrasite

#39102
SOLD
Montebrasite from Midnight Owl mine, Yavapai Co., Arizona, United States - 39102
Montebrasite from Midnight Owl mine, Yavapai Co., Arizona, United States - 39102

Montebrasite

#39102
Availability
Sold
Size
6.5 x 5 x 5.5 cm - Sm Cabinet 
Formula
LiAlPO4(OH) (RRUFF)
Locality
Midnight Owl mine, Yavapai Co., Arizona, United States
Tagged
phosphate , pegmatite mineral

An old David Shannon stock specimen showing the hydroxyl end member of the amblygonite-montebrasite series. This I believe takes Raman analysis.

Montebrasite is a primary phosphate which occurs in zoned lithium-rich pegmatites.

Montebrasite

Formula
LiAlPO4(OH) 
Crystal System
Triclinic 
Crystal Habit
Massive - Granular, Prismatic 
Cleavage
Perfect, Good, Distinct 
Luster
Vitreous - Greasy 
Color
bluish, colorless, greenish, greenish gray, gray white 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Conchoidal 
Hardness
5.5-6 

Data courtesy of Webmineral.

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