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Bastnäsite-(Ce) - Trimouns, Luzenac, Ariege, France (#:MINS9031)

Very sharp cluster of translucet Bastnäsite-(Ce) xls 6 mm wide with orangey color set on contrasting matrix.

Formula :
(Ce,La)(CO₃)(OH,F)
System: hexagonal Hardness:4-4½ Rarity:very rare
Strunz id:V/C.7-20 - NITRATES, CARBONATES and BORATES
Name origin: For the locality at the Bastnäs mines, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden, plus the "Hydroxyl" prefix due to the dominance of the hydroxyl radical over fluorine and the "-(Ce)" suffix due to the dominance of cerium in the composition.