Definition of columbite in English:

columbite

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.

    • ‘It is most abundant in the coarse-grained facies and is often associated with triphylite, columbite, and sphalerite.’
    • ‘It occurs most commonly in the minerals columbite, tantalite, and microlite.’
    • ‘Beryl, columbite, and triphylite are common accessory minerals in the Estes pegmatite, especially in the coarse-grained layers.’
    • ‘These minerals are columbite, microlite, futile, thorite, and zircon.’
    • ‘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.’

Origin

Early 19th century: from columbium + -ite.

Pronunciation:

columbite

/kəˈlʌmbʌɪt/