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Pentlandite

Type Locality
Craignure Mine, Inveraray, Strathclyde (Argyllshire), Scotland, UK
Mineral Data
(Fe,Ni)9S8
Strunz: 
2.BB.15
Physical Properties
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0
Tenacity: 
brittle