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Xenotime-(Y) [abbr. Xtm ]

Year of discovery: 1832 (Hidra, Norway), 1915 (Japan)

Locality list: 170 localities of xenotime-(Y)

• YPO₄
• [Y³⁺][PO₄]^3-

• Class: Xenotime group
• Class: Phosphate
• Soluble in: HCl (Slightly), HNO₃ (Slightly), H₂SO₄ (Slightly)
• Magnetism: Paramagnetic

• Y => Fe: Rodolicoite
• Y => Al: Berlinite
• Y => Sc: Pretulite
• Y => Yb: Xenotime-(Yb)
• Y => Ce: Monazite-(Ce)
• Y => Nd: Monazite-(Nd)
• Y => La: Monazite-(La)
• Y => Sm: Monazite-(Sm)

• PO₄ => AsO₄: Chernovite-(Y) (Series)
• PO₄ => VO₄: Wakefieldite-(Y)

• Color: Yellowish brown, Grayish brown, Reddish brown
• Streak: Pale yellow
• Luster: Vitreous
• Diaphaneity: Translucent-Opaque

• Habit: Bipyramidal

• Cleavage: Perfect on {100} (1 plane)
• Hardness: 4-5
• Density: 5.0

• System: Tetragonal
• Group: 4/m, I4₁/a
• Lattice: a=6.9, c=6.0

Etymology: Xenos (Empty), -time (honor) in Greek