gratonite
Sign in to saveGratonite 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.
Key facts
- Mineral.name
- Gratonite
- Mineral.image
- Gratonite-20896.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Gratonite, Excelsior Mine, Cerro de Pasco, Peru, the type locality. 1.7 x 1.6 x 1.5 cm.
- Mineral.category
- Sulfosalt minerals
- Mineral.formula
- Pb9As4S15
- Mineral.IMAsymbol
- Gtn
- Mineral.strunz
- 2.JB.55
- Mineral.system
- Trigonal
- Mineral.class
- Ditrigonal pyramidal (3m) (same H-M symbol)
- Mineral.symmetry
- R3m
via Wikipedia infobox
Wikidata facts
- Image
- Gratonite-rare08-42b.jpg
Show 7 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 2.JB.55
- chemical formula
- Pb₉As₄S₁₅
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 2.JB.55
- Commons category
- Gratonite
- Mohs' hardness
- 2.5
- IMA Mineral Symbol
- Gtn
- Strunz 8th edition (series ID, updated)
- II/D.06
Sources (2)
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Article
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- External links
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.
==References==