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Betafite

#64434
Betafite from Silver Crater mine, Bancroft, Ontario, Canada - 64434
Betafite from Silver Crater mine, Bancroft, Ontario, Canada - 64434

Betafite

#64434
Availability
Available
Price
$75.00
Size
2 x 2 x 2 cm - Thumbnail 
Formula
A2(Ti,Nb)2O6Z (RRUFF)
Locality
Silver Crater mine, Bancroft, Ontario, Canada

Once known simply as the mineral species, Betafite, now in a complex mineral group called the Betafite group, which belongs to the super group of Pyrochlores with a complicated nomenclature. Compositionally, Betafites are oxides of titanium and niobium with variable subtitutions of cations uranium and calcium in the A position and variable amounts of anions O, OH, H2O, or F in the Z position.

This specimen, like the others show the cubic and octahedral forms with sharp edges.

Radioactive!!

Betafite

Formula
(Ca,U)2(Ti,Nb,Ta)2O6(OH) 
Crystal System
Isometric 
Crystal Habit
Encrustations, Massive - Granular 
Cleavage
None, None, None 
Luster
Vitreous - Greasy 
Color
brown, black, brownish green, yellow, greenish black 
Streak
yellowish white 
Class
Isometric - Hexoctahedral 
Fracture
Conchoidal 
Hardness
5-5.5 

Data courtesy of Webmineral.

Special Info
Radioactive!!
Mineralpedia
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Previously Sold Betafite
On Dakota Matrix
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