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Columbite-Tantalite

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TPX1151620

Description Tabs

Description
Locality: 
Tsaramanga Pegmatite, Mahaiza, Betafo, Vakinankaratra, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.2 × 1.1 cm
Weight: 
7.00gr
Description

Very interesting specimen of these important minerals of the rare earths, is a combination of Columbite and Tantalite known world-wide like COLTAN

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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5
Europe
18.60
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18.85
Asia & Oceania
20.50
Africa
17.20

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