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Columbite

Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb2O6], is a black mineral group that is an ore of niobium.

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Alessandro Fantini (MP3 Music)

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The investigation of alluvial columbite and columbite bearing pegmatites of 1/4+ field sheet 57, Nsaba N.W.

M. W. Ghana Geological Survey. Morgans (Unknown Binding)

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Columbite (Mineral resources pamphlet / Guyana Geology and Mines Commission)

Karen Livan (Unknown Binding)

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Relationship of density to composition in the columbite-tantalite series

William Joseph Campbell (Paperback - Jan 1, 1955)

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Columbite - Wikipedia
Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb 2 O 6], is a black mineral group that is an ore of niobium. It has a submetallic luster ...
en.wikipedia.org
Columbite: Columbite mineral information and data.
Columbite was long used as a species name but is now split between the iron end-member columbite-(Fe) and the manganese end-member columbite-(Mn) and ...
www.mindat.org
THE MINERAL COLUMBITE - Amethyst Galleries
Columbite is the most widespread niobium mineral and makes for an important ore of the industrially useful metal. Niobium, Nb, is used in alloys for improved strength.
www.galleries.com
columbite | mineral | Britannica.com
columbite: Hard, black (often iridescent), heavy oxide mineral of iron, manganese, and niobium, (Fe, Mn)Nb 2 O 6. Tantalum atoms replace niobium atoms in the crystal ...
www.britannica.com
Columbite-(Fe) Mineral Data
Columbite-(Fe) Microcline. Comments: Blocky, dark brown ferrocolumbite on pale greenish blue amazonite (microcline). Location: Crystal Park, El Paso Co., Colorado, USA.
webmineral.com
Columbite: The mineral columbite-tantalite information and ...
Detailed description, properties, locality information guide about the mineral columbite (columbite-tantalite).
www.minerals.net
Columbite | Define Columbite at Dictionary.com
Columbite definition, a black, crystalline mineral, iron niobate, (Fe, Mn)Nb 2 O 6 , the principal ore of niobium, an end member of a series of solid solutions in ...
www.dictionary.com
Columbite - definition of columbite by The Free Dictionary
Define columbite. columbite synonyms, columbite pronunciation, columbite translation, English dictionary definition of columbite. n. A black, red-brown, ...
www.thefreedictionary.com
Columbite | Definition of Columbite by Merriam-Webster
Define columbite: a black mineral consisting mostly of iron and niobium
www.merriam-webster.com
Columbite-Tantalite: Columbite-Tantalite mineral information ...
A generic name for minerals of the Columbite/Tantalite families which are difficult to distinguish without sophisticated tests.
www.mindat.org

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