Mineralogy Database

Mattheddleite Mineral Data

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General Mattheddleite Information

Help on Chemical  Formula: Chemical Formula: Pb20(SiO4)7(SO4)4Cl4
Help on Composition: Composition: Molecular Weight = 5,314.65 gm
   Silicon    3.70 %  Si    7.91 % SiO2
   Lead      77.97 %  Pb   83.99 % PbO
   Sulfur     2.41 %  S     6.03 % SO3
   Chlorine   2.67 %  Cl    2.67 % Cl
               -   %   Cl   -0.60 % -O=Cl2   
   Oxygen    13.25 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb20(SiO4)7(SO4)4Cl4
Help on Environment: Environment: Lining cavities in quartz which contain other oxidized lead minerals.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: From Leadhills, Lanarkshire, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Matthew Forster Heddle (1828-1897), Scottish mineralogist.
Help on Name Pronunciation: Name Pronunciation: Mattheddleite + Pronunciation Say MATTHEDDLEITE