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Formula: Cu6As4S9
Valence: Cu1+6As3+4S2-9
Sulphosalt, sulpharsenite of copper
Crystal System: Triclinic
Specific gravity:
Hardness: 4 to 4½
Colour: Bronze, steel-grey, silver
Environments
Sedimentary environments
Hydrothermal environments
Localities
There are two co-type localities, Binn Valley, Valais, Switzerland, and the Lengenbach Quarry, Fäld, Binn,
Goms, Valais, Switzerland.
At Lengenbach, sinnerite occurs on sulphides in crystalline
dolostone. Associated minerals include
realgar, coloradoite,
tennantite, galena and
sphalerite
(HOM).
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