niobite

from WordNet (r) 3.0 (2006)
niobite
    n 1: a black mineral that is an ore of niobium and tantalum
         [syn: {niobite}, {columbite}]
from The Collaborative International Dictionary of English v.0.48
niobite \ni"o*bite\, n. (Min.)
   Same as {Columbite}.
   [1913 Webster]
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