Pyrites

Pyrites (from the adjective other Greek χαλκηδόνιος - Chalkedonian , from Chalkedon ( other Greek Χαλκηδών ) - other Greek colony in Asia Minor; through the mean Latin Lat.calcidonius, chalcedonius lapis and fr. Calcédoine - - an outdated collective name applied to minerals from the group of sulfides and arsenides containing iron , tin , copper , as well as sulfur or arsenic . The most famous is sulfuric or iron pyrites (pyrite, FeS ₂ ), which is used to produce sulfur and sulfuric acid . Radiant pyrites (orthorhombic iron disulfide FeS ₂ , or marcasite ), magnetic pyrites (Fe ₇ S ₈ , or pyrrhotite ), arsenic pyrites FeAsS , molybdenum pyrites , arsenic pyrites (mineral lellingite ) FeAs ₂ , nickel pyrites ( chloro mineral) are also known . Co, Ni) As ₃ used to produce arsenic, iron-nickel pyrite ((Fe, Ni) ₉ S ₈ ), tin pyrite ( stannine ) and copper pyrite CuFeS ₂ (chalcopyrite) , variegated copper pyrite (Cu ₅ FeS ₄ ), cobalt pyrites ((Fe, Co) S ₂ ).

Pyrites
Copper pyrite ore
Formula	FeS 2 , FeAs 2 , CuFeS 2 , (Co, Ni) As 3
Impurity	Co
Physical properties
Colour	Golden, reddish, gray
Hardness	3-6
Density	4-6 g / cm³

Ore deposits are used for the production of:

• Sulfuric acid - iron pyrite and magnetic pyrite.
• Extraction of metals - iron-nickel pyrite, nickel pyrite, copper pyrite, tin pyrite.

A village ) and a village in the Sverdlovsk region are named after the pyrite mineral family.