co·lum·bite (k -l m b t )n. A black, red-brown, or colorless mineral, essentially (Fe, Mn)(Nb, Ta)2O6, the principal ore of niobium. [columb(ium) + -ite.] |
columbite [kəˈlʌmbaɪt]
n
(Earth Sciences / Minerals) a black mineral consisting of a niobium oxide of iron and manganese in orthorhombic crystalline form: occurs in coarse granite, often with tantalite, and is an ore of niobium Formula: (Fe, Mn)(Nb)2O6 Also called niobite
[from columbium + -ite1]
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | columbite - 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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