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Potassic-magnesio-fluoro-arfvedsonite

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RMM566447

Potassic-magnesio-fluoro-arfvedsonite

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Description Tabs

Description
Locality: 
Kipawa, Sheffield Lake, Les Lacs-du-Témiscamingue, Abitibi-Témiscamingue, Québec, Canada
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3 × 2.8 cm
Description

This is a specimen of dark blue-green potassic-magnesio-fluoro-arfvedsonite. It is an amphibole with pronounced cleavage, associated with white albite. Also present is green richterite, and minor purple fluorite, and tan rinkite-ce.

Mineral Data
What's on the rock

Potassic-magnesio-fluoro-arfvedsonite

Formula: 
[(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2]
Strunz: 
9.DE.25
Hardness: 
0.0
Type Locality: 
Highway 366 roadcut, Val-des-Monts, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada...

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