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Bismutocolumbite

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JYJ770521

Bismutocolumbite

Description Tabs

Description
Locality: 
Pamir Mountains, Gorno Badakhshan, Tajikistan
Class: 
Massive/Crystalline
Size Range: 
Micromount (under 1cm)
Size: 
0.2 × 0.1 × 0.1 cm
Description

A dark grain of bismutocolumbite from an old systematic collection. 

Rare mineral. 

 

Mineral Data
What's on the rock

Bismutocolumbite

Formula: 
Bi(Nb,Ta)O4
Strunz: 
4.DE.30
Crystal System: 
Orthorhombic
Hardness: 
5.5
Type Locality: 
Danburitovaya pegmatite vein, Malkhan pegmatite field (Malchan; "Malechansk"), Krasnyi Chikoy, Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia...