Mineralogy Database

Hephaistosite Mineral Data

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General Hephaistosite Information

Help on Chemical  Formula: Chemical Formula: TlPb2Cl5
Help on Composition: Composition: Molecular Weight = 793.05 gm
   Thallium  24.23 %  Tl   27.07 % Tl2O3
   Lead      52.51 %  Pb   54.54 % Pb2O
   Bromine    1.41 %  Br    1.41 % Br
               -   %   Br   -0.14 % -O=Br2   
   Chlorine  21.68 %  Cl   21.68 % Cl
               -   %   Cl   -4.89 % -O=Cl2   
   Fluorine   0.17 %  F     0.17 % F
               -   %   F    -0.07 % -O=F2    
            ______        ______ 
            100.00 %       99.77 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Tl0.94Pb2.01Cl4.85Br0.14F0.07
Help on Environment: Environment: Found in a high-temperature fumarole (~400°C) at the rim of La Fossa crater. Isostructural with challacolloite.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Greek god of fire, Hephaistos (Hephaestus), whose workshops were alleged located at the locality (Vulcano).
Help on Synonym: Synonym: IMA2006-043