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Pierrotite - Jas Roux, La Chapelle-en-Valgaudemar (La Chapelle-en-Valgaudémar), Hautes-Alpes, Provence-Alpes-Côte d'Azur, France (TYPE LOCALITY)
(#:MINS7669)
Dark gray metallic Pierrotite in sub-mm crystals with realgar in association from the type locality.
Formula :
Tl
2
As
4
Sb
6
S
16
System:
orthorhombic
Hardness:
3½
Rarity:
very rare
Strunz id:II/E.14-30 - SULFIDES
Name origin:
Named in 1970 by Claude Guillemin, Zdeněk Johan, Claude P. Laforêt, Paul Picot in honor of French mineralogist, Roland Pierrot (1930-1998). He was Head of the Mineralogy Department and General Secretary of the National Geographical Service at BRGM (French Geological Survey)
Specimen weight:6 gr.
Crystal size:Sub-mm
Overall size: 20mm x 13 mm x 22 mm
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