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Birnessite

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Watches:
SHS39532

Birnessite

ex. Dr. Wilke (Eppertshausen/Germany)

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 2.8 × 2.1 cm
Largest Crystal: 
2.80cm
Description

Black birnessite

Mineral Data
What's on the rock

Birnessite

Formula: 
(Na,Ca)0.5(Mn4+,Mn3+)2O4·1.5H2O
Strunz: 
4.FL.45
Crystal System: 
Orthorhombic
Hardness: 
1.5
Type Locality: 
Birness, Ellon, Buchan Grampian (Aberdeenshire), Scotland, UK