Columbite - Wikipedia
Columbite, also called niobite, niobite-tantalite and columbate, with a general chemical formula of (Fe II, Mn II) Nb 2 O 6, is a black mineral group that is an ore of niobium. It has a submetallic luster, a high density, and is a niobate of iron and manganese. Niobite has many applications in areospace, construction and the medical industry.
Columbite | Niobium, Tantalum, Ore | Britannica
Columbite, hard, black (often iridescent), heavy oxide mineral of iron, manganese, and niobium, (Fe, Mn)Nb2O6. Tantalum atoms replace niobium atoms in the crystal structure to form the mineral tantalite, which is similar but much more dense. These minerals are the most abundant and widespread of.
The Mineral columbite - The Mineral and Gemstone Kingdom
Columbite is the niobium-rich member, and Tantalite is the tantalum-rich member. Columbite is named after its niobium content, which was previous known as columbium prior to its renaming. Columbite is the most important mineral containing the rare element niobium and is its main ore.
COLUMBITE (Iron Manganese Magnesium Niobium Tantalum …
Chemical Formula: (Fe, Mn, Mg) (Nb, Ta) 2 O 6, Iron Manganese Magnesium Niobium Tantalum Oxide. Uses: An ore of niobium and tantalum and as mineral specimens. Columbite is the most widespread niobium mineral and makes for an important ore of the industrially useful metal.
Columbite Group: Mineral information, data and localities.
Columbite Group mineral data, information about Columbite Group, its properties and worldwide locations.
Columbite- (Fe): Mineral information, data and localities.
The current species, columbite-(Fe) retains the old root name and has the suffix -(Fe) to indicate the dominance of iron in the species. Columbite was the second species named from the USA, after celestine (q.v.)
Coltan - Wikipedia
Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is tantalite. [1]
Columbite Definition & Meaning - Merriam-Webster
The meaning of COLUMBITE is a black mineral consisting mostly of iron and niobium.
Columbite - an overview | ScienceDirect Topics
Synonym (s): Coltan, Columbite, Dianite, Ferrocolumbite, Niobite. Chemical Composition: FeNb 2 O 6. Polymorphism with: Comp. Series: Columbite- (Mn), Tantalite- (Fe) Crystallographic System: orthorhombic.
Columbite-tantalite (COLTAN) - Engineering.com
2006年10月17日 · COLTAN (Columbite-Tantalite) is a dull metallic ore found in major quantities in the eastern areas of Congo. When refined, COLTAN becomes metallic Tantalum, a heat-resistant powder that can hold a high electrical charge.