Arsenopyrite

sulpharsenide

hydrothermal

Formula: FeAsS
Supharsenide
Specific gravity: 5.9 - 6.2
Hardness: 5½ - 6
Streak: Black
Colour: Tin white to steel white
Solubility: Arsenopyrite is moderately soluble in nitric acid but insoluble in hydrochloric and sulphuric acids
Environments:

Pegmatites (sparingly)
Metamorphic environments
Hydrothermal environments

Arsenopyrite is the most common arsenic-containing mineral. It occurs with tin and tungsten ores in high-temperature hydrothermal deposits, associated with silver and copper ores, galena, sphalerite, pyrite and chalcopyrite. It is frequently associated with gold. It is found in contact metamorphic deposits, and disseminated in limestone.

Common impurities: Ag,Au,Co,Sn,Ni,Sb,Bi,Cu,Pb

Back to Minerals