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Ishikawaite & Columbite-(Fe)

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JYJ785915

Ishikawaite & Columbite-(Fe)

Description Tabs

Description
Locality: 
Ilmen Natural Reserve, Ilmen Mountains, Chelyabinsk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 2.7 × 1.8 cm
Description

Black ishikawaite with red radiation rim with pale blue corundum and columbite-Fe. SEM-EDS confirmed specimen. 

 

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

Columbite-(Fe)

Formula: 
FeNb2O6
Strunz: 
4.DB.35
Hardness: 
6.0
Type Locality: 
Green's Well pegmatite (Green's Tank), Pilgangoora, Wallareenya Station, Port Hedland Shire, Western Australia, Australia...
Analysis
Analysis Report - only: Ishikawaite & Columbite-(Fe)
Analysis Report - only: Ishikawaite & Columbite-(Fe)