Mineralogy Database

Gjerdingenite-Mn Mineral Data

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General Gjerdingenite-Mn Information

Help on Chemical Formula: Chemical Formula: (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 2,494.47 gm
   Potassium   4.81 %  K     5.80 % K2O
   Barium      0.61 %  Ba    0.68 % BaO
   Sodium      1.07 %  Na    1.44 % Na2O
   Magnesium   0.03 %  Mg    0.05 % MgO
   Titanium    4.20 %  Ti    7.01 % TiO2
   Manganese   2.00 %  Mn    2.59 % MnO
   Niobium    22.05 %  Nb   31.54 % Nb2O5
   Aluminum    0.10 %  Al    0.18 % Al2O3
   Zinc        0.42 %  Zn    0.52 % ZnO
   Iron        1.57 %  Fe    2.02 % FeO
   Silicon    17.91 %  Si   38.32 % SiO2
   Hydrogen    1.10 %  H     9.85 % H2O
   Oxygen     44.13 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3.07Na1.16Ba0.11Mn2+0.91Fe2+0.7Zn0.16Mg0.03Nb5.92Ti2.19Si15.91Al0.09O48O6.32(OH)1.68 (H2O)12.8
Help on Environment: Environment: Miarolitic cavities of a sodic granite ('ekerite') . Mn-dominant analogue of gjerdingenite-Fe, the Ti analogue of kuzmenkoite-Mn and a dimorph of organovaite-Mn. Labuntsovite group
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Mn-dominant analogue of gjerdingenite-Fe.
Help on Synonym: Synonym: IMA2003-015