fergusonite

Noun
  1. A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals (synset 114699173)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym:
    • atomic number 68, er, erbium - a trivalent metallic element of the rare earth group; occurs with yttrium
    • atomic number 73, ta, tantalum - a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
    • atomic number 39, y, yttrium - a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys

Found on Word Lists

Other Searches