Mineralogy Database

Tungusite Mineral Data

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General Tungusite Information

Help on Chemical Formula: Chemical Formula: [Ca14(OH)8](Si8020)(Si8020)2[Fe++9(OH)14]
Help on Composition: Composition: Molecular Weight = 761.15 gm
   Sodium      1.45 %  Na    1.95 % Na2O
   Calcium    18.22 %  Ca   25.49 % CaO
   Magnesium   0.67 %  Mg    1.11 % MgO
   Manganese   1.01 %  Mn    1.30 % MnO
   Aluminum    1.52 %  Al    2.88 % Al2O3
   Iron       10.27 %  Fe   11.61 % FeO /  1.78 % Fe2O3
   Silicon    21.92 %  Si   46.89 % SiO2
   Hydrogen    0.79 %  H     7.10 % H2O
   Oxygen     44.14 %  O
             ______        ______ 
             100.00 %      100.13 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3.46Na0.48Mn2+0.06Fe2+1.23Al0.37Mg0.21Fe3+0.17Mn2+0.08Si5.94Al0.06O15(OH)6
Help on Environment: Environment: A secondary mineral forming crusts lining cavities and amygdules in hydrothermally altered basalts.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Found along the Lower Tunguska River, near Tura, central Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Tungusite + Pronunciation Say TUNGUSITE