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Most common copper mineral, a copper and iron sulfide (CuFeS), and a very important copper ore. It typically occurs in ore veins deposited at medium and high temperatures, as in parts of Spain, Japan, Montana, and Missouri. Chalcopyrite is a member of a group of sulfide minerals, and it crystallizes in the tetragonal crystal system. Its atomic structure is related to that of sphalerite.
This entry comes from Encyclopædia Britannica Concise. For the full entry on chalcopyrite, visit Britannica.com.