fergusonite definition

  • noun:
    • A mineral made up of oxides of varied rare-earth elements.
    • A mineral of a brownish black colored shade, really a tantalo-niobate of yttrium, erbium, and cerium; -- so named after Robert Ferguson.
    • A brownishblack mineral consisting primarily of niobic acid and yttria, and crystallizing when you look at the tetragonal system.
    • a dark mineral comprising oxides of yttrium and erbium and tantalum also nutrients
    • A mineral composed of oxides of various rare-earth elements.
    • A mineral of a brownish black colored color, essentially a tantalo-niobate of yttrium, erbium, and cerium; -- so named after Robert Ferguson.
    • A brownishblack mineral consisting primarily of niobic acid and yttria, and crystallizing into the tetragonal system.
    • a dark mineral composed of oxides of yttrium and erbium and tantalum as well as other nutrients

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