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Ekmanite

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SHS569805

Ekmanite

Description Tabs

Description
Locality: 
Brunnsjögruvan, Grythyttan, Hällefors, Örebro County, Sweden
Class: 
Massive/Crystalline
Size Range: 
Micromount (under 1cm)
Size: 
0.5 × 0.4 × 0.4 cm
Description

Nice ekmanite in matrix

Mineral Data
What's on the rock

Ekmanite

Variety Of: 

Stilpnomelane

Formula: 
(K,Ca,Na)(Fe2+,Mg,Al,Fe3+)8(Si,Al)12(O,OH)36·nH2O
Strunz: 
9.EG.40
Hardness: 
3.0 - 4.0
Formula: 
(Fe2+,Mg,Mn,Fe3+)3(Si,Al)4O10(OH)2·2H2O
Crystal System: 
Orthorhombic
Hardness: 
0.0