Mineralogy Database

Gratonite Mineral Data

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General Gratonite Information

Help on Chemical  Formula: Chemical Formula: Pb9As4S15
Help on Composition: Composition: Molecular Weight = 2,645.48 gm
   Arsenic  11.33 %  As
   Lead     70.49 %  Pb
   Sulfur   18.18 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Pb9As4S15
Help on Environment: Environment: In vugs in hydrothermal copper ores.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1939
Help on Locality: Locality: In the Excelsior mine, Cerro de Pasco, Peru, in large crystals. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Louis Carly Graton (1880-1970), Professor of Economic Geology, Harvard University, Cambridge, Massachusetts, USA.
Help on Name Pronunciation: Name Pronunciation: Gratonite + Pronunciation Say GRATONITE
Help on Synonym: Synonym: ICSD 18097
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