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Ferri-winchite

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SKY539279

Ferri-winchite

Classic Locality

Description Tabs

Description
Locality: 
Långban, Filipstad, Värmland County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.6 × 0.5 × 0.3 cm
Description

Small but sharp black isolated crystalks of the very rare mineral feri-winchite from the famous Langban deposit in Sweden. Ferri-winchite is a relatevely new mineral (IMA 2004-034).

Analyzed specimen.

Mineral Data
What's on the rock

Ferri-winchite

Formula: 
☐[CaNa][Mg4(Fe3+,Al)]Si8O22(OH)2
Strunz: 
9.DE.20
Hardness: 
5.5
Colour: 
black
Type Locality: 
Ilmenogorsky alkaline complex (Ilmensky), Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

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