A black mineral that is an ore of niobium and tantalum. Synonym: niobite.
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"Columbite" Quotes from Famous Books — The 1991 CIA World Factbook • United States. Central Intelligence Agency. |
Words linked to "Columbite" : tantalum, mineral, niobium, atomic number 41, Ta, atomic number 73, nb, columbite-tantalite |
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