xenotime

Noun
  1. A brown-to-yellow mineral that is a phosphate of yttrium in crystalline form (synset 115130522)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym:
    • atomic number 69, thulium, tm - a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
    • atomic number 70, yb, ytterbium - a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
    • atomic number 39, y, yttrium - a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys

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