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Lengenbachite Jordanite & Dufrénoysite

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SER909258

Lengenbachite Jordanite & Dufrénoysite

Type Locality

Description Tabs

Description
Locality: 
Lengenbach Quarry, Binntal, Valais, Switzerland
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.2 × 1.1 cm
Description

some clusters of lengenbachite blades with grey jordanite and needles of metallic dufrenoysite ; Lengenbach quarry is the type locality of these three species

Mineral Data
What's on the rock

Lengenbachite

Formula: 
Ag4Cu2Pb18As12S39·
Strunz: 
2.HF.30
Crystal System: 
Monoclinic
Hardness: 
1.0 - 2.0
Streak: 
Black
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

Jordanite

Formula: 
Pb14(As,Sb)6S23
Strunz: 
2.JB.30a
Hardness: 
3.0
Streak: 
Black
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

Dufrénoysite

Formula: 
Pb2As2S5
Strunz: 
2.HC.05d
Crystal System: 
Monoclinic
Hardness: 
3.0
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland