• 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-(Mn): Mineral information, data and localities.

    www.mindat.org/min-2520.html 6 photos of Columbite-(Mn) associated with Quartz: SiO 2: 5 photos of Columbite-(Mn) associated with Hydroxycalciomicrolite: Ca 1.5 Ta 2 O 6 (OH) 4 photos of Columbite-(Mn) associated with Orthoclase: K(AlSi 3 O 8) 4 photos of Columbite-(Mn) associated with Microcline: K(AlSi 3 O 8) 4 photos of Columbite-(Mn) associated with Cleavelandite: Na ...
  • 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)Nb 2 O 6. 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 the naturally occurring niobates and tantalates and are important ores, their elements niobium ...
  • Columbite-(Mn)

    www.mindatnh.org/Columbite-Mn%20sheet.html COLUMBITE-(Mn) (Mn,Fe)(Nb,Ta) 2 O 6 Locality: Corson Mine, Nottingham, NH: Specimen Size: 1 mm crystal on Albite: Environment: Granite pegmatite: Field collected: Tom Mortimer
  • 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.
  • Columbite: The mineral columbite-tantalite information and ...

    www.minerals.net/mineral/columbite.aspx The name Columbite has been discredited by the IMA, with the more specific designations of Columbite-(Fe) (also known as Ferrocolumbite), and Columbite-(Mn) (also known as Manganocolumbite) being used for this mineral's IMA-accepted nomenclature.Most Columbite specimens are of the Ferrocolumbite; Manganocolumbite is far less common. An even rarer member of this series is (Columbite-(Mg ...
  • Columbite-Mn with Albite, Muscovite - Minerals For Sale ...

    www.weinrichmineralsinc.com/.../columbite-mn-with-albite-muscovite-3513095.php Columbite-Mn with Albite, Muscovite. specimen number: 3513095. location: Ponte de Piaui mine, Itinga, Minas Gerais, Brazil. description: A black columbite crystal 0.3 cm in size and albite crystal matrix. Watch Specimen Video. Size: 2.6 x 2.0 x 1.5 cm (thumbnail)
  • Columbite-(Mn) Mineral Specimen For Sale

    www.dakotamatrix.com/products/24956/columbite-mn Columbite-(Mn) - A black Columbite crystal to 1.2cm in white Montebrasite. The old Kidwell labeled had Topaz in association. I believe it to by Quartz. . This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
  • 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.