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Birnessite

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SHS123490

Birnessite

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Description
Locality: 
Lepkhe-Nel'm Mountain, Seidozero Lake, Lovozero Massif, Murmansk Oblast, Russian Federation
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.7 × 1.1 cm
Description

Birnessite in matrix

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