A black mineral that is an ore of niobium and tantalum. Synonym: niobite.
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"Columbite" Quotes from Famous Books ![]() ![]() — The 2000 CIA World Factbook • United States. Central Intelligence Agency. ![]() |
Words linked to "Columbite" : Ta, tantalum, mineral, atomic number 73, nb, niobium, atomic number 41 |
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