Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Columbite-Tantalite

Views:
Watches:
TPX596972

Columbite-Tantalite

Rare Mineral

Description Tabs

Description
Locality: 
Assunção Mine, Aldeia Nova, Sátão, Viseu District, Portugal
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1 × 0.8 cm
Weight: 
10.00gr
Description

Small but 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

Seller Information

Payment options: offline, paypal_wpp, paypal_wps