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<p><b>New page</b></p><div>[[File:Chalcopyrite-199453.jpg|Chalcopyrite-199453|thumb]] '''Chalcopyrite''' ([[IUPAC]] name: copper iron sulfide) is a [[mineral]] that is a major source of [[copper]]. It has the chemical formula CuFeS<sub>2</sub>. Chalcopyrite is found in most [[sulfide mineral]] deposits around the world and has been known since ancient times. Miners have historically referred to chalcopyrite as "copper pyrites" due to its bronze-yellow color and metallic luster, making it superficially similar to [[pyrite]]. However, unlike pyrite, which is a source of [[sulfur]] and [[iron]], chalcopyrite is a significant source of copper, one of the few metals with a natural color other than gray or silver.<br />
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==Properties==<br />
Chalcopyrite has a brass-yellow color that has a greenish tint in oxidized conditions. It has a hardness of 3.5 to 4 on the [[Mohs scale]] of mineral hardness and a specific gravity of approximately 4.1 to 4.3. This mineral has a metallic luster and a greenish-black streak. Chalcopyrite is a [[tetragonal]] system mineral, meaning it has three axes of symmetry. Two of these axes are of equal length while the third is different, contributing to its unique crystal structure.<br />
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==Formation==<br />
Chalcopyrite forms in [[hydrothermal vein]]s, where fluids from deep within the earth's crust come into contact with minerals at lower temperatures and pressures, leading to the deposition of chalcopyrite along with other minerals like [[quartz]], [[sphalerite]], and [[galena]]. It can also be found in [[volcanogenic massive sulfide ore deposit]]s (VMS), [[porphyry copper]] deposits, and as disseminations within [[igneous rock]]s. The formation of chalcopyrite is a complex process that involves the interaction of sulfur with copper and iron in hydrothermal environments.<br />
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==Extraction and Uses==<br />
The primary use of chalcopyrite is in the extraction of [[copper]], which is a critical material for electrical wiring, plumbing, and the manufacture of alloys. The extraction process typically involves crushing the ore and subjecting it to a process called [[froth flotation]] to concentrate the copper content. The concentrated copper is then smelted to produce copper metal. Chalcopyrite is also a source of [[gold]] and [[silver]], as these precious metals are often found within or alongside copper deposits.<br />
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==Environmental Impact==<br />
The mining and processing of chalcopyrite can have significant environmental impacts. The extraction process can produce large amounts of waste rock and [[tailings]], which can release [[sulfur dioxide]] and other pollutants into the environment. Additionally, the use of water in the processing of chalcopyrite can lead to water pollution if not properly managed. Efforts are being made to reduce the environmental impact of chalcopyrite mining by developing more sustainable mining practices and technologies for processing copper.<br />
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==See Also==<br />
* [[Copper mining]]<br />
* [[Mineralogy]]<br />
* [[Sulfide minerals]]<br />
* [[Ore]]<br />
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[[Category:Minerals]]<br />
[[Category:Copper minerals]]<br />
[[Category:Sulfide minerals]]</div>Prab