Mineralogy Database

Kochite Mineral Data

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General Kochite Information

Help on Chemical Formula: Chemical Formula: Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4
Help on Composition: Composition: Molecular Weight = 1,505.08 gm
   Sodium      7.90 %  Na   10.64 % Na2O
   Strontium   0.12 %  Sr    0.14 % SrO
   Calcium    15.74 %  Ca   22.02 % CaO
   Lanthanum   0.18 %  La    0.22 % La2O3
   Cerium      0.47 %  Ce    0.55 % Ce2O3
   Yttrium     0.30 %  Y     0.38 % Y2O3
   Hafnium     0.12 %  Hf    0.14 % HfO2
   Zirconium   9.21 %  Zr   12.44 % ZrO2
   Titanium    5.22 %  Ti    8.70 % TiO2
   Manganese   3.91 %  Mn    5.04 % MnO
   Niobium     1.36 %  Nb    1.94 % Nb2O5
   Aluminum    0.04 %  Al    0.07 % Al2O3
   Vanadium    0.03 %  V     0.05 % V2O3
   Iron        0.85 %  Fe    1.10 % FeO
   Silicon    15.19 %  Si   32.50 % SiO2
   Oxygen     32.35 %  O
   Fluorine    7.03 %  F     7.03 % F
                -   %   F    -2.96 % -O=F2    
             ______        ______ 
             100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.92Sr0.02Na2.77Ca1.23Ca3.52Na0.48Mn2+1.07Ca0.81Y0.05Ce0.05La0.02Zr1.41Fe2+0.23 Ca0.35Hf0.01Ti1.64Nb0.22Zr0.11Al0.02F1.57
Help on Environment: Environment: Found in nepheline syenite rocks at Hvide Ryg.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Werner Bjerge alkaline complex, East Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Lauge Koch (1892-1964), Danish geologist who mapped Werner Bjerge.
Help on Synonym: Synonym: IMA2002-012