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Gratonite Mineral Data
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General Gratonite Information
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 Chemical Formula: |
Pb9As4S15 |
| Composition: |
Molecular Weight = 2,645.48 gm |
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Arsenic 11.33 % As |
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Lead 70.49 % Pb |
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Sulfur 18.18 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb9As4S15 |
| Environment: |
In vugs in hydrothermal copper ores. |
| IMA Status: |
Valid Species (Pre-IMA) 1939 |
| Locality: |
In the Excelsior mine, Cerro de Pasco, Peru, in large crystals. Link to MinDat.org Location Data. |
| Name Origin: |
For Louis Carly Graton (1880-1970), Professor of Economic Geology, Harvard University, Cambridge, Massachusetts, USA. |
| Name Pronunciation: |
Gratonite + Pronunciation  |
| Synonym: |
ICSD 18097 |
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PDF 44-1412 |
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