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Mangano-ferri-eckermannite

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RFJ845349

Mangano-ferri-eckermannite

Description Tabs

Description
Locality: 
Tanohata Mine, Iwate Prefecture, Honshu Island, Japan
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
3 × 5.2 × 2.5 cm
Description

Magano-ferri-eckermannite is Worldwide seen a very rare Mineral. The biggest intergrown crystals have about 2mm diameter.

They looking Black unter strong light in a thin layer they are redish brown.

Its from the Type locality.

Mineral Data
What's on the rock

Mangano-ferri-eckermannite

Formula: 
[Na][Na2][Mn2+4(Fe3+)]Si8O22(OH)2
Strunz: 
9.DE.25
Crystal System: 
Monoclinic
Hardness: 
5.0
Type Locality: 
Tanohata mine, Shimohei-gun, Iwate Prefecture, Tohoku Region, Honshu Island, Japan

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