Columbite, also called niobite, niobite-tantalite and columbate, with a general chemical formula of (FeII,MnII)Nb2O6, is a black mineral group that is...

Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum...

chemically similar to columbite, and the two are often grouped together as a semi-singular mineral called coltan or "columbite-tantalite" in many mineral...

Coesite Coffinite Cohenite Colemanite Colimaite Collinsite Coloradoite Columbite (mineral group) Combeite Conichalcite Connellite Cooperite Copiapite Copper...

MnII)Ta2O6, a tantalum(V) mineral group close to that of columbite Coltan, a mixture of columbite and tantalite series Galaxite, MnIIAl2O4, a spinel mineral...

Coltan is the colloquial name for the mineral columbite-tantalum ("col-tan"). In the early 21st century coltan mining is associated with human rights...

the chemically similar niobium, mainly in the mineral groups tantalite, columbite and coltan. The chemical inertness and very high melting point of tantalum...

Protectorates was founded. By the 1940s, Nigeria was a major producer of tin, columbite, and coal. The discovery of oil in 1956 hurt the mineral extraction industries...

specimens. In 1801, Hatchett analyzed a piece of columbite from the collection at the British Museum. Columbite turned out to be a very complex mineral, and...

alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite. Its name comes from Greek mythology: Niobe, daughter of Tantalus, the...

This confirmed that Charles Hatchett had discovered niobium in 1801 in columbite ore. Hatchett had named the new element "columbium", from the ore in which...

001 ft) above sea level in the Shere Hills range near Jos. Years of tin and columbite mining have left the area strewn with deep gorges and lakes. Bauchi State –...

spodumene, petalite, amblygonite, lepidolite, elbaite, cassiterite, columbite, apatite, eucryptite, muscovite, albite and microcline. About 82% of the...

which specialises and has a monopoly in the production of the metal ore columbite. Drax is also the backer of the 'Moonraker' missile project being built...

2010 Never Let Me Go Hannah 2013 About Time Catherine "Kit-Kat" Lake Columbite Tantalite Anna Short film Hereafter Katcher Short film 2016 Star Trek...

Other industries include food processing and canning facilities, tin and columbite mining, and tourism in Yankari National Park and its Wikki Warm Springs...

respectively. Wamba also has minerals deposit like lead, barite, tantalite, columbite, and gems such as Aquamarine and gold. Yet to be exploited officially...

minerals include quartz, feldspar, spodumene, amblygonite, tourmaline, columbite, cassiterite, topaz and beryl. Notable occurrences include Brazil; Ural...

Year Product Volume (in tons) 2008 Columbite-tantalite 65.196...

reported that they detected the element in platinum ore and in the mineral columbite. They also found rhenium in gadolinite and molybdenite. In 1928 they were...

of the Tuy. Upon graduation she moved with her maternal grandmother, Columbite, (so she called the baby). She defined herself as introverted but listening...

that they had detected the element in platinum ore and in the mineral columbite. They also found rhenium in gadolinite and molybdenite. In 1928 they were...

natural resources: gold cassiterite (tin ore) wolframite (tungsten ore) columbite-tantalite (tantalum and niobium ore) methane hydro-electric power coffee...

Niobium Nb Alloys, corrosion resistance Pyrochlore (Na,Ca)2Nb2O6(OH,F) and columbite ((FeII,MnII)Nb2O6) in granitic pegmatites Platinum Group Pt Dentistry...

Franklinite (Zn,Fe,Mn)(Fe,Mn)2O4 Chromite FeCr2O4 Chrysoberyl BeAl2O4 Columbite (Fe,Mn)(Nb,Ta)2O6 Hydroxide subgroup: Brucite Mg(OH)2 Manganite MnO(OH)...

to columbite and tantalite. Those minerals have the same chemical composition, but different crystal symmetry orthorhombic for tantalite or columbite and...

natural gas, bauxite, iron ore, sandstone, lignite, clay, coal, tin and columbite. The zone has recently been plagued by crisis as the call for secession...

Nigeria's natural resources include but are not limited to petroleum, tin, columbite, iron ore, coal, limestone, lead, zinc, natural gas, hydropower, and arable...

granite pegmatites with other rare minerals. It occurs in association with columbite, zircon, monazite, uraninite, aeschynite, magnetite, albite, topaz, beryl...

minerals found in Ananthapur district include allanite, cerite, thorite, columbite, tantalite, apatite, zircon, monazite, pyrochlore euxenite and fluorite...