Definition of columbite in English:

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columbite

Pronunciation: /kəˈlʌmbʌɪt/

noun

[mass noun]
A black mineral, typically occurring as dense tabular crystals, consisting of an oxide of iron, manganese, niobium, and tantalum. It is the chief ore of niobium.
Example sentences
  • The abundance of these elements in the parental magma leads to the formation of less-common minerals such as apatite, beryl, topaz, amblygonite, lepidolite, spodumene tantalite, columbite, monazite, zircon, and uraninite.
  • It occurs most commonly in the minerals columbite, tantalite, and microlite.
  • These minerals are columbite, microlite, futile, thorite, and zircon.

Origin

Early 19th century: from columbium + -ite1.

For editors and proofreaders

Line breaks: col¦um|bite

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