Images
Formula: Y(CO3)F
Anhydrous carbonates containing halogen, bastnäsite group,
yttrium-bearing mineral
Crystal System: Hexagonal
Specific gravity: 3.9 to 4.0
Hardness: 4 to 4½
Streak: White
Colour: Translucent brick-red
Solubility:
Weakly RADIOACTIVE
Environments:
Localities
At the type locality, the Verkhnee Espe Massif, Akzhaylyautas Mountains, Tarbagatai Range, East Kazakhstan, Kazakhstan,
bastnäsite-(Y) occurs as a rare secondary mineral in a
microcline-quartz
pegmatite vein, associated with
fluorite,
microcline, hematite and
quartz
(HOM).
Back to Minerals