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Pyrrhotite

Mineral Data
Fe1-xS (x = 0 to 0.17)
Strunz: 
2.CC.10
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Synonyms
Synonyms: 
Pyrrhotine, Pirrotina and Pirrotite
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