Multiple oxide containing niobium, tantalum and titanium; forms series with polycrase-(Y) and also with columbite; metamict
Specific gravity: 5.3 to 5.9
Hardness: 5½ to 6½
Streak: Yellowish, grayish, reddish brown
Colour: Black, greenish or brownish tint at times
Euxenite-(Y) is a rare-earth mineral that occurs in granite pegmatites and also
as a component of detrital black sands (Webmin, HOM).
Associated minerals include albite, microcline,
thorite, uraninite and
At the Gole quarry, Murchison township, Ontario, Canada, euxenite-(Y) is associated with fergusonite-(Y) (Dana).
The type locality is a pegmatite at Jølster, Sogn og Fjordane, Norway.
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