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Columbite-(Mn)

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CR825342

Columbite-(Mn)

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Description
Locality: 
Alto das Furnas, Equador, Rio Grande do Norte, Brazil
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 2.6 × 2.5 cm
Largest Crystal: 
1.70cm
Description

A sharp and perfect terminated columbite-Mn crystal in matrix.

With minor Waylandite. Ex Armin Wendland collection

EDS analyzed specimen.

Mineral Data
What's on the rock

Columbite-(Mn)

Formula: 
(Mn,Fe)(Nb,Ta)2O6
Strunz: 
4.DB.35
Hardness: 
6.0