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

    www.mindat.org/min-2520.html Originally referred to as manganocolumbite, it was changed to the current form in 2008 (Burke 2008). The name refers to the relationship to the other columbite group species, with dominant manganese.
  • 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 - 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.
  • 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.
  • Columbite-(Mn) Mineral Data - webmin.mindat.org

    webmin.mindat.org/data/Columbite-(Mn).shtml Plumbopyrochlore Columbite-(Mn). 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.
  • Columbite | Geology Page

    www.geologypage.com/2013/11/columbite.html 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.
  • Columbite | Definition of Columbite at Dictionary.com

    www.dictionary.com/browse/columbite Columbite definition, a black, crystalline mineral, iron niobate, (Fe, Mn)Nb2O6, the principal ore of niobium, an end member of a series of solid solutions in which manganese and tantalum combine to form tantalite. See more.
  • Columbite | mineral | Britannica.com

    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 (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-(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. SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser! Log In Register.