• Tapiolite - Wikipedia

    en.wikipedia.org/wiki/Tapiolite Tapiolite [(Fe, Mn)(Nb, Ta) 2 O 6] is a black mineral series that is an ore of niobium and tantalum.The tapiolite group includes tapiolite-(Fe) or ferrotapiolite and tapiolite-(Mn) or manganotapiolite. Tapiolite-(Fe) is by far the more common of the two.
  • Tapiolite-(Mn): Mineral information, data and localities.

    www.mindat.org/min-2523.html Tapiolite-(Fe)-Tapiolite-(Mn) Series. - This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence.?? - Indicates mineral may be doubtful at this locality.
  • Tapiolite-(Mn) Mineral Data

    webmineral.com/data/Tapiolite-(Mn).shtml General Tapiolite-(Mn) Information : Chemical Formula: (Mn++,Fe++)(Ta,Nb)2O6 : Composition: Molecular Weight = 482.71 gm Calcium 0.33 % Ca 0.46 % CaO: Tantalum 63.73 % Ta 77.81 % Ta 2 O 5: Manganese 7.97 % Mn 10.29 % MnO: Niobium 5.77 % Nb 8.26 % Nb 2 O 5: Iron 2.31 % Fe 2.98 % FeO: Oxygen 19.89 % O: 100.00 % 99.80 % = TOTAL OXIDE
  • Tapiolite Mineral Data

    webmineral.com/data/Tapiolite.shtml General Tapiolite Information : Chemical Formula: (Fe,Mn)(Ta,Nb)2O6 : Composition: Molecular Weight = 495.95 gm Tantalum 65.67 % Ta 80.19 % Ta 2 O 5: Manganese 2.22 % Mn 2.86 % MnO: Niobium 3.75 % Nb 5.36 % Nb 2 O 5: Iron 9.01 % Fe 11.59 % FeO: Oxygen 19.36 % O: 100.00 % 100.00 % = TOTAL OXIDE
  • Tapiolite Mineral Data - webmin.mindat.org

    webmin.mindat.org/data/Tapiolite.shtml General Tapiolite Information : Chemical Formula: (Fe,Mn)(Ta,Nb)2O6 : Composition: Molecular Weight = 495.95 gm Tantalum 65.67 % Ta 80.19 % Ta 2 O 5: Manganese 2.22 % Mn 2.86 % MnO: Niobium 3.75 % Nb 5.36 % Nb 2 O 5: Iron 9.01 % Fe 11.59 % FeO: Oxygen 19.36 % O: 100.00 % 100.00 % = TOTAL OXIDE
  • Tapiolite-(Fe) Mineral Data

    webmin.mindat.org/data/Tapiolite-(Fe).shtml General Tapiolite-(Fe) Information : Chemical Formula: (Fe++,Mn++)(Ta,Nb)2O6 : Composition: Molecular Weight = 500.02 gm Tantalum 68.76 % Ta 83.96 % Ta 2 O 5: Manganese 3.30 % Mn 4.26 % MnO: Niobium 0.93 % Nb 1.33 % Nb 2 O 5: Iron 7.82 % Fe 10.06 % FeO: Oxygen 19.20 % O: 100.00 % 99.60 % = TOTAL OXIDE
  • Tapiolite-(Fe): Mineral information, data and localities.

    www.mindat.org/min-1531.html ID Species Reference Link Year Locality Pressure (GPa) Temp (K) 0017872: Tapiolite-(Fe) von Heidenstam O (1968) Neutron and X-ray diffraction studies on tapiolite and some synthetic substances of trirutile structure Arkiv for Kemi 28 375-387 1968: 0: 293: 0017873: Tapiolite-(Fe) von Heidenstam O (1968) Neutron and X-ray diffraction studies on tapiolite and some synthetic substances of ...
  • Wisconsin Geological & Natural History Survey » Tapiolite ...

    wgnhs.wisc.edu/minerals/tapiolite-series Formula: (Fe,Mn)(Ta,Nb) 2 O 6 – (Mn,Fe)(Ta, Nb) 2 O 6 Tetragonal Description: A series exists between ferri-tapiolite and manganotapioltie. These rare minerals are found in complex granite pegmatites. MARATHON COUNTY: A member of the tapiolite series is found as rare small black masses in pegmatites at the Koss Pit (SW sec. 2 T.27 N. R.5E.) SW of Rib Mountain.
  • Tapiolita-(Mn) - Wikipedia, entziklopedia askea.

    eu.wikipedia.org/wiki/Tapiolita-(Mn) Tapiolita-(Mn) oxido motako minerala da eta tapiolita taldearen kidea da. Ezaugarriak. Tapiolita-(Mn) oxido mineralaren formula kimikoa hau da: (,) (,). Sistema tetragonalaren arabera sortzen ditu kristalak. Mohs eskalaren arabera duen gogortasunaren balioa 6 - 6,5 da. Eraketa eta ...
  • Tantalite - Wikipedia

    en.wikipedia.org/wiki/Tantalite The mineral group tantalite [(Fe, Mn)Ta 2 O 6] is the primary source of the chemical element tantalum.It 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. However, tantalite has a much greater specific gravity than columbite (8.0+ compared to columbite's 5.2).