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Columbite-Tantalite

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PDM884566

Columbite-Tantalite

Description Tabs

Description
Locality: 
Rwanda
Class: 
Single Crystal
Size Range: 
Cabinet (10-18 cm)
Size: 
10.9 × 5.2 × 4.7 cm
Weight: 
592.00gr
Description

Huge floater crystal of columbite-tantalite that is complete and with rounded edges and corners due to some fluvial transport.

Its weight is almost 0.6 Kg and it was collected in 1966 in Rwanda (no specific locality is given) by professor Albert Delvaux (1919-1998).

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Mineral Data
What's on the rock

Columbite-Tantalite

Synonym Of: 

Columbite-(Fe)

Formula: 
FeNb2O6
Strunz: 
4.DB.35
Hardness: 
6.0

Columbite-(Mn)

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

Stibiocolumbite

Formula: 
Sb(Nb,Ta)O4
Strunz: 
4.DE.30
Hardness: 
5.5

Stibiotantalite

Formula: 
Sb(Ta,Nb)O4
Strunz: 
4.DE.30
Hardness: 
5.5

Tantalite-(Fe)

Formula: 
FeTa2O6
Strunz: 
4.DB.35
Hardness: 
6.0 - 6.5

Tantalite-(Mn)

Formula: 
MnTa2O6
Strunz: 
4.DB.35
Hardness: 
6.0

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