• Columbite - Wikipedia

    en.wikipedia.org/wiki/Columbite Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb 2 O 6], is a black mineral group that is an ore of niobium.It has a submetallic luster and a high density and is a niobate of iron and manganese.This mineral group was first found in Haddam, Connecticut, in the United States.It forms a series with the tantalum-dominant analogue ferrotantalite and one with the manganese ...
  • Columbite | mineral | Britannica

    www.britannica.com/science/columbite 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
  • Columbite: The mineral columbite-tantalite information and ...

    www.minerals.net/mineral/columbite.aspx Columbite forms a solid solution series with Tantalite known as the Columbite-Tantalite series. 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-(Fe): Mineral information, data and localities.

    www.mindat.org/min-1514.html Columbite was the second species named from the USA, after celestine (q.v.) Type Locality: ⓘ Green's Well pegmatite (Green's Tank), Pilgangoora (Pilgangoora Mining Centre; Lynas Find; McPhees Patch; Mount York), Wallareenya Station, Port Hedland Shire, Western Australia, Australia
  • Columbite - an overview | ScienceDirect Topics

    www.sciencedirect.com/topics/earth-and-planetary-sciences/columbite The 1800 Ga pegmatites of Kimito Island represent beryl pegmatites (beryl-columbite subgroup) and albite pegmatites, except the Lövböle RE-pegmatite, which belongs to the gadolinite subgroup. These pegmatites are mostly hosted by gabbros ( Lindroos et al., 1996 ) and their distribution is shown in Figure 5 of Eilu et al. (2012) .
  • COLUMBITE (Iron Manganese Magnesium Niobium Tantalum Oxide)

    www.galleries.com/Columbite Columbite is the most widespread niobium mineral and makes for an important ore of the industrially useful metal. Niobium, Nb, is used in alloys for improved strength. It also has shown superconductive properties and is being studied with other metals for a possible breakthrough alloy in this new industrial field.
  • Columbite-(Mn) Mineral Data

    webmineral.com/data/Columbite-(Mn).shtml Columbite-(Mn) Plumbopyrochlore Comments: Yellow-brown plumbopyrochlore crystalline crust over black manganocolumbite grain.Such plumbopyrochlore-manganocolumbite ovoids with different grade of replacement are very typical for the locality. Location: Amazonite pegmatites of Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.
  • Columbite-(Fe)-Columbite-(Mn) Series: Mineral information ...

    www.mindat.org/min-8667.html Columbite-(Fe)-Columbite-(Mn) Series mineral data, information about Columbite-(Fe)-Columbite-(Mn) Series, its properties and worldwide locations.
  • Coltan - Wikipedia

    en.wikipedia.org/wiki/Coltan Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which are extracted the elements niobium and tantalum.The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is the tantalite.. Tantalum from coltan is used to manufacture tantalum capacitors which are ...
  • Tantalite: The mineral columbite-tantalite information and ...

    www.minerals.net/mineral/tantalite.aspx Tantalite forms a solid solution series with Columbite known as the Columbite-Tantalite series. Tantalite is the tantalum-rich member, and Columbite is the niobium-rich member. Tantalite is named after its tantalum content, and, together with Columbite, are the most important minerals containing the rare element tantalum.