Columbite, also called niobite, niobite-tantalite and columbate, with a general chemical formula of (FeII,MnII)Nb2O6, is a black mineral group that is...
26 KB (2,818 words) - 11:01, 26 June 2024
Coltan (redirect from Columbite-tantalite)
Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum...
64 KB (5,614 words) - 14:52, 27 August 2024
chemically similar to columbite, and the two are often grouped together as a semi-singular mineral called coltan or "columbite-tantalite" in many mineral...
6 KB (439 words) - 01:30, 29 August 2024
Coesite Coffinite Cohenite Colemanite Colimaite Collinsite Coloradoite Columbite (mineral group) Combeite Conichalcite Connellite Cooperite Copiapite Copper...
42 KB (2,782 words) - 13:51, 17 September 2024
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...
15 KB (1,767 words) - 21:34, 19 August 2024
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...
2 KB (232 words) - 12:21, 27 January 2024
Coltan is the colloquial name for the mineral columbite-tantalum ("col-tan"). In the early 21st century coltan mining is associated with human rights...
23 KB (3,019 words) - 16:01, 30 June 2024
the chemically similar niobium, mainly in the mineral groups tantalite, columbite and coltan. The chemical inertness and very high melting point of tantalum...
54 KB (6,196 words) - 00:13, 1 October 2024
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...
17 KB (1,673 words) - 13:40, 8 April 2024
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...
7 KB (533 words) - 09:11, 13 September 2024