Synonyms
1. columbite
noun. a black mineral that is an ore of niobium and tantalum.
Synonyms
- mineral
- atomic number 73
- niobium
- niobite
- Ta
- Nb
- atomic number 41
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2. columbite-tantalite
noun. a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips.
Synonyms
- coltan