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Twinnite

Type Locality
Taylor Pit, Huntingdon Township, Madoc area, Hastings Co., Ontario, Canada
Mineral Data
Pb0.8Tl0.1Sb1.3As0.8S4
Strunz: 
2.HC.05a
Physical Properties
Colour: 
Black
Crystal System: 
Triclinic
Hardness: 
3.5