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Ishikawaite

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JYJ1031223

Ishikawaite

Description Tabs

Description
Locality: 
Ilmen Mountains, Chelyabinsk Oblast, Russian Federation
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.8 × 2.4 cm
Description

Black ishikawaite and columbite-Fe with corundum from the Pit no 298, Ilmen Mts., Chelyabinsk Oblast, Russia. 

Rare mineral.

Mineral Data
What's on the rock

Ishikawaite

Formula: 
U4+Fe2+Nb2O8
Strunz: 
4.DB.25
Hardness: 
5.0 - 6.0
Colour: 
Black
Type Locality: 
Ishikawa-gun, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan