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
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