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1 item @ $25.00   30:00

Pyrochlore

#6513

Pyrochlore

#6513
Availability
Sold
Size
0.7 x 0.7 x 0.7 cm - Thumbnail 
Formula
Unavailable
Locality
Myeba, Tonganyika, Kenya

Two 7mm cubo-octahedral crystals of some member of the Pyrochlore supergroup, which will have niobium in the composition. 

Pyrochlore

Formula
(Na,Ca)2Nb2O6(OH,F) 
Crystal System
Isometric 
Crystal Habit
Granular, Disseminated 
Cleavage
Indistinct, Indistinct, Indistinct 
Luster
Resinous - Greasy 
Color
brown, yellowish brown, yellow, greenish brown, reddish brown 
Streak
yellowish brown 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
5-5.5 

Data courtesy of Webmineral.

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