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Bastnasite-(La)

#36340
SOLD
Bastnasite-(La) from Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia - 36340
Bastnasite-(La) from Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia - 36340

Bastnasite-(La)

#36340
Availability
Sold
Size
7.5 x 4 x 1 cm - Sm Cabinet 
Formula
LaCO3F (RRUFF)
Locality
Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia
Tagged
carbonate , REE mineral

Thin light blue crusts on shaley matrix with Malachite. Basnasite-La is a rare mineral that occurs in late ankerite carbonatites at its type locality in the Belaya Zima REE-Nb deposit in Russia. The blue in this bastnasite is due to an impurity of copper.

Bastnasite-(La)

Formula
LaCO3F 
Crystal System
Hexagonal 
Crystal Habit
Prismatic, Massive - Granular 
Cleavage
Imperfect, Indistinct, None 
Luster
Vitreous - Greasy 
Color
yellow, reddish brown 
Streak
white 
Class
Hexagonal - Ditrigonal Dipyramidal 
Fracture
Uneven 
Hardness
4-5 

Data courtesy of Webmineral.

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