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Takéuchiite

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JYJ110169

Takéuchiite

ex R. Feigl

Description Tabs

Description
Locality: 
Långban, Filipstad, Värmland County, Sweden
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.5 × 0.8 cm
Description

Black acicular crystals of takeuchite, a very rare borate mineral.

Mineral Data
What's on the rock

Takéuchiite

Formula: 
(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
Strunz: 
6.AB.40
Hardness: 
6.0
Colour: 
Black
Streak: 
Brown
Type Locality: 
Långban, Filipstad, Värmland, Sweden