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Pinakiolite

#PD38583

Pinakiolite

#PD38583
Availability
Sold
Size
8 x 4 x 3.5 cm - Sm Cabinet 
Formula
(Mg,Mn2+)2(Mn3+,Sb5+)O2(BO3) (RRUFF)
Locality
Långban, Filipstad, Värmland, Sweden

Black or deep brown micaceous looking crystal plates. Pick at these crystals and you realize it is far from micaceous. It is hard and not easily broken. See old label in prov. tab indicating that it is from the Bolivia stope.

Type Locality

Pinakiolite

Formula
(Mg,Mn2+)2(Mn3+,Sb5+)O2(BO3
Crystal System
Monoclinic 
Crystal Habit
Tabular 
Cleavage
Good, None, None 
Luster
Adamantine - Metallic 
Color
black 
Streak
brown gray 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Type Locality

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