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单词 columbite
释义

WordReference Random House Unabridged Dictionary of American English © 2024
co•lum•bite  (kə lumbīt),USA pronunciation n. 
  1. Mineralogya black, crystalline mineral, iron niobate, (Fe, Mn)Nb2O6, the principal ore of niobium, an end member of a series of solid solutions in which manganese and tantalum combine to form tantalite.
  • columb(ium) + -ite1 1795–1805

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