Mineralogy Database

Columbite-(Mn) Mineral Data

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General Columbite-(Mn) Information

Help on Chemical Formula: Chemical Formula: (Mn,Fe++)(Nb,Ta)2O6
Help on Composition: Composition: Molecular Weight = 394.81 gm
   Tantalum   27.50 %  Ta   33.58 % Ta2O5
   Titanium    1.21 %  Ti    2.02 % TiO2
   Manganese   6.96 %  Mn    8.98 % MnO
   Niobium    32.94 %  Nb   47.13 % Nb2O5
   Iron        7.07 %  Fe    9.10 % FeO
   Oxygen     24.31 %  O
             ______        ______ 
             100.00 %      100.81 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.5Fe2+0.5Nb1.4Ta0.6Ti0.1O6
Help on Environment: Environment: Constituent of granitic pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1892
Help on Locality: Locality: Globe and Harding pegmatites, Taos County, New Mexico, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the MANGANese content and the relationship to columbite (ferrocolumbite).
Help on Name Pronunciation: Name Pronunciation: Columbite-(Mn) + Pronunciation Say COLUMBITE-(MN)
Help on Synonym: Synonym: Manganocolumbite - Renamed to Columbite-(Mn) by Mineralogical Record, v39 (2008), p 131