niobite
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Related to niobite: columbite, Ferrocolumbite
ni·o·bite
(nī′ə-bīt′)n.
Columbite.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
niobite
(ˈnaɪəˌbaɪt)n
(Minerals) another name for columbite
[C19: niobium + -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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| Noun | 1. | niobite - a black mineral that is an ore of niobium and tantalum atomic number 41, Nb, niobium - a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium atomic number 73, Ta, tantalum - a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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