Phosphate of yttrium, xenotime group, forms a series with xenotime-(Yb) and with chernovite-(Y), zircon is an epitaxial mineral (Mindat)
Specific gravity: 4.4 to 5.1
Hardness: 4 to 5
Streak: Pale brown, yellowish or reddish, white
Colour: Yellowish brown, reddish brown, light red, flesh-red, light green, grey, greyish white, wine-yellow. Colourless to very light yellowish green, yellow or yellowish brown in transmitted light (Mindat)
Solubility: Very lightly attacked by acids
At Saint-Pierre-de-Broughton, Quebec, Canada, xenotime-(Y) is an exceedingly rare accessory mineral found in small cavities in albite schist hosting anatase- and brookite- bearing Alpine fissures. It's only associate here is chamosite (R&M 85.6.508-509).
At the type locality, Hidra, Flekkefjord, Agder, Norway, xenotime-(Y) occurs in a granite pegmatite (Mindat).
In the Wassau Complex pegmatites, Marathon county, Wisconsin, USA, xenotime-(Y) has been found in a greisen assemblage associated with cassiterite, ferberite-hübnerite and topaz (R&M 88-4.361-362).
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