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Lengenbachite

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