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Chalcopyrite (/ ˌ k æ l k ə ˈ p aɪ ˌ r aɪ t,-k oʊ-/ [7] [8] KAL-kə-PY-ryte, -koh-) is a copper iron sulfide mineral and the most abundant copper ore mineral. It has the chemical formula CuFeS 2 and crystallizes in the tetragonal system.
Formula (repeating unit) FeS 2: IMA symbol: Mrc [1] Strunz classification: 2.EB.10a: Crystal system: ... such as pyrrhotite or chalcopyrite. Sedimentary marcasite and ...
Eskebornite is a selenide mineral with the formula Cu Fe Se 2. [2] [3] It crystallizes in the tetragonal system and it has a brassy colour. Eskebornite is sometimes found as thick tabular crystals, but is more often found intergrown with other selenides. [4] It is part of the chalcopyrite group and forms a series with chalcopyrite. [5]
It has the chemical formula CuFe 2 S 3 and when found, it has a bronze to brass-yellow appearance. On the Mohs hardness scale, cubanite falls between 3.5 and 4 and has a orthorhombic crystal system. [2] Cubanite is chemically similar to chalcopyrite; however, it is the less common copper iron sulfide mineral due to crystallization requirements.
Bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with the more common chalcopyrite.Chalcopyrite and bornite are both typically replaced by chalcocite and covellite in the supergene enrichment zone of copper deposits.
Covellite (gray) replacing and embaying chalcopyrite (light), polished section from Horn Silver Mine, San Francisco Mining District, Utah. Enlarged to 210 diameters. Enlarged to 210 diameters. Covellite (also known as covelline ) is a rare copper sulfide mineral with the formula CuS. [ 4 ]
The structure of the other members of the crichtonite group is similar and corresponds to the formula AM 21 O 38. The crystals of cleusonite consist of multiple rhombohedra and hexagonal prisms that are twinned. The crystal system is a trigonal - rhombohedral class 3 and has space group of R 3.
Galena typically is found in hydrothermal veins in association with sphalerite, marcasite, chalcopyrite, cerussite, anglesite, dolomite, calcite, quartz, barite, and fluorite. It is also found in association with sphalerite in low-temperature lead-zinc deposits within limestone beds.