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

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

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

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

kimberlites) may be considered to be eluvial deposits. Cassiterite and columbite-tantalite deposits also occur as residual or eluvial concentrations. The Pitinga...

Associated mineral species include elbaite, lepidolite, spodumene, columbite-tantalite, wodginite, and microlite. Warr, L.N. (2021). "IMA–CNMNC approved...

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

of tremolite/actinolite) Niobite (synonym of columbite) Niobite-tantalite (synonym of columbite-tantalite) Okenite Oldhamite Olgite Olivenite Olivine (a...

compared the oxides derived from both columbium—columbite, with a density 5.918 g/cm3, and tantalum—tantalite, with a density over 8 g/cm3, and concluded...

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