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Perroudite & Chlorargyrite

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SKY179775

Perroudite & Chlorargyrite

Rare Mineral

Description Tabs

Description
Locality: 
Capitana Mine, Copiapó Province, Atacama Region, Chile
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 1 cm
Description

Nice example of the very rare mineral perroudite, a mineral of curious composition Hg5Ag4S5(I,Br)2Cl2. There are only 6 minerals (of almost 5000 species) that contain at the same time the 3 halides Cl, Br and I ! In addition it is a silver mineral. Associated pale yellow clear crystals are chlorargyrite (third and fifth photos)

Mineral Data
What's on the rock

Perroudite

Formula: 
Hg5Ag4S5(I,Br)2Cl2
Strunz: 
2.FC.20c
Hardness: 
2.0
Type Locality: 
Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France...

Chlorargyrite

Formula: 
AgCl
Strunz: 
3.AA.15
Crystal System: 
Isometric
Hardness: 
1.5 - 2.5
Streak: 
White
Type Locality: 
Marienberg District, Erzgebirge, Saxony, Germany

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