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Metamorphic processes: Chalcopyrite can also form during metamorphism, which is the process of rock transformation due to high temperature and pressure conditions.Hydrothermal chalcopyrite deposits are often associated with volcanic or geothermal activity. Hydrothermal processes: Chalcopyrite can also form through hydrothermal processes, where hot, metal-rich fluids percolate through rocks and deposit chalcopyrite along fractures, faults, or other structural features.As the magma cools and solidifies, chalcopyrite can precipitate from the magma and accumulate in veins or disseminated throughout the rock. Magmatic processes: Chalcopyrite can crystallize from a magma during the formation of igneous rocks, particularly in association with copper-rich intrusions.Chalcopyrite can form through various geological processes, including: Geology of Chalcopyrite: Chalcopyrite is commonly found in a variety of geological settings, and its occurrence is often associated with copper-rich ore deposits. Tetrahedron, commonly massive, and sometimes botryoidal.Ĥ.1 – 4.3 g/cm3 (Measured) 4.18 g/cm3 (Calculated) Predominantly the disphenoid and resembles a Physical Properties of Chalcopyriteīrass yellow, may have iridescent purplishĬolor, greenish streak, softer than pyrite, Chalcopyrite is known for its good electrical conductivity, which makes it an important mineral for copper extraction and various industrial applications.

The crystal structure of chalcopyrite gives it unique physical and chemical properties, including its metallic luster, opaque appearance, and characteristic brassy-yellow color.

Crystal Symmetry: Chalcopyrite has a tetragonal symmetry, with the space group I-42d or I-42m, depending on the temperature and pressure conditions.

Sulfur Sublattice: The sulfur atoms in chalcopyrite form a close-packed sublattice, with copper and iron atoms occupying the interstitial sites between the sulfur atoms.

The sulfur atoms are arranged in a close-packed manner.

Coordination Geometry: Each copper atom in chalcopyrite is coordinated by six sulfur atoms in an octahedral arrangement, while each iron atom is coordinated by four sulfur atoms in a tetrahedral arrangement.

Unit Cell: The unit cell of chalcopyrite is a parallelepiped shape with four sides of unequal length and four right angles.

The crystal structure of chalcopyrite can be described as follows: It has a complex structure consisting of copper and iron atoms bonded with sulfur atoms in a crystal lattice. It is a sulfide mineral, with copper and iron being the main cations and sulfur as the anion.Ĭrystal Structure: Chalcopyrite has a unique crystal structure that belongs to the tetragonal system. Chemical composition and crystal structure of chalcopyriteĬhalcopyrite has a chemical composition of CuFeS2, which indicates that it is composed of copper (Cu), iron (Fe), and sulfur (S) atoms. Usually pyrite is said that a fool’s gold, but because of the rich yellow chalcopyrite tone it is said that mixing with gold is a better candidate.Īssociation: Sphalerite, galena, tetrahedrite, pyrite, many copper sulfides. It is source material for many other notable copper-bearing minerals like turquoise, malachite, cuprite, azurite, etc Some of this has enough gold or silver that it can be an ore of those metals without the consideration of its copper content. It is hardness of 3.5 – 4 on the Mohs scale and diagnostic properties streak is black green, opaque, with a metallic luster, and poor cleavage with a tetragonal crystal system.

It colour is brass-yellow and tarnishes to gray green and It is chemical composition of CuFeS2.

Mineralogical characteristics and identification methodsĬhalcopyrite most important ore of copper mineral in the word for thousand of years.Chemical composition and crystal structure of chalcopyrite.