Mineralogy Database

Tounkite Mineral Data

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General Tounkite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca,K)8Al6Si6O24(SO4)2Cl•(H2O)
Help on Composition: Composition: Molecular Weight = 1,204.49 gm
   Potassium   5.19 %  K     6.26 % K2O
   Sodium      7.44 %  Na   10.03 % Na2O
   Calcium     7.65 %  Ca   10.71 % CaO
   Aluminum   13.22 %  Al   24.97 % Al2O3
   Silicon    14.22 %  Si   30.43 % SiO2
   Hydrogen    0.17 %  H     1.50 % H2O
   Sulfur      5.32 %  S    13.29 % SO3
   Chlorine    2.94 %  Cl    2.94 % Cl
                -   %   Cl   -0.66 % -O=Cl2   
   Oxygen     43.83 %  O
             ______        ______ 
             100.00 %       99.47 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3.9Ca2.3K1.6Si6.1Al5.9O24(SO4)2Cl•(H2O)
Help on Environment: Environment: Replaces lazurite in diopside-lazurite rocks.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Malaya Bystraya and Tultuy lazurite deposits, south of Lake Baikal, Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Tunka (Tounka) Valley near the deposits.
Help on Name Pronunciation: Name Pronunciation: Tounkite Say TOUNKITE
Help on Synonym: Synonym: IMA1990-009