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Columbite
noun
Definitions
Noun
- 1 A black mineral that is a mixed iron and manganese niobate and tantalate, and is the main ore of niobium and tantalum.
- 2 a black mineral that is an ore of niobium and tantalum wordnet
Etymology
From columbium (“niobium”) + -ite.
See also for "columbite"
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