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18 statements · 33% with external sources · numbers in brackets are citations
On other databases
4 identifiers linking gratonite across the web's reference databases
18 statements · 33% with external sources · numbers in brackets are citations
4 identifiers linking gratonite across the web's reference databases
From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0
Gratonite is a lead-arsenic sulfosalt mineral, with the chemical composition Pb9As4S15. It is considered a low-temperature dimorph of jordanite. Gratonite was discovered in 1939 at the Excelsior Mine, Cerro de Pasco, Peru. It is named in honor of geologist L. C. Graton (1880–1970), who had a long-standing association with the Cerro de Pasco mines. The other location where it is found is the Rio Tinto mine, Minas de Riotinto (Huelva), Spain. The crystals are very similar to those from Cerro de Pasco.