-
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...
- the
chemically similar niobium,
mainly in the
mineral groups tantalite,
columbite and coltan. The
chemical inertness and very high
melting point of tantalum...
-
Coltan is the
colloquial name for the
mineral columbite-tantalum ("col-tan"). In the
early 21st
century coltan mining is ****ociated with
human rights...
-
Bruce Pearson 2013
About Time
Jimmy Kincade 8
Minutes Idle Dan
Thomas Columbite Tantalite Mark
Short film 2014 I Am
Soldier Sergeant /
Trooper Mickey...
-
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...
- 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...
-
Niobium 1801 C.
Hatchett 1864 W.
Blomstrand Hatchett found the
element in
columbite ore and
named it columbium. In 1809, W. H.
Wollaston claimed that columbium...
