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Columbite-Tantalite Inclusions

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ZSO865731

Columbite-Tantalite Inclusions

Radioactive

Description Tabs

Description
Locality: 
Darrah I Pech, Chapa Dara District, Kunar Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 4.3 × 2.2 cm
Description

There is a large acicular columbite-tantalite inclusion in transparent quartz with a radioactive spot in the end of the crystal.
Analyzed specimen.

This is a very interesting appearance.
U-bearing inclusions in quartz crystal. Rarely seen in such beautiful dark spots in similarly clear transparent quartz.
Radioactive minerals in quartz has left black (smoky) radiated halos. (Pleochroic halo)

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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