Editing Bornite (section)

{{Short description|Sulfide mineral}}
{{Redirect|Peacock ore|another sulfide mineral sometimes called that|Chalcopyrite}}
{{infobox mineral
| name        = Bornite
| category    = [[Sulfide mineral]]
| boxwidth    = 
| boxbgcolor  = 
| image       = Bornite-Quartz-135210.jpg
| imagesize   = 260px
| caption     = Lightly iridescent bornite crystal on quartz needles, from Kazakhstan<br>{{small|Specimen size: {{cvt|3.6|×|2.2|×|1.2|cm|in}}}}
| formula     = Cu<sub>5</sub>FeS<sub>4</sub>
| IMAsymbol=Bn<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref>
| molweight   = 501.88 g/mol
| strunz      = 2.BA.10
| system      = [[Orthorhombic]]
| class       = Dipyramidal (mmm) <br/>[[H-M symbol]]: (2/m 2/m 2/m)
| symmetry    = ''Pbca''
| unit cell   = a = 10.95&nbsp;Å, b = 21.862&nbsp;Å, <br/>c = 10.95&nbsp;Å; Z&nbsp;=&nbsp;16
| color       = Copper red, bronze brown, purple
| habit       = Granular, massive, disseminated – Crystals pseudocubic, dodecahedral, octahedral
| twinning    = Penetration twins on [111]
| cleavage    = Poor on [111]
| fracture    = Uneven to subconchoidal
| tenacity    = Brittle
| mohs        = 3–3.25
| luster      = Metallic if fresh, [[iridescence|iridescent]] tarnish
| refractive  = Opaque
| opticalprop = 
| birefringence = 
| pleochroism = Weak but noticeable
| streak      = Grayish black
| gravity     = 5.06–5.08
| density     = 
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| diaphaneity = 
| other       = Magnetic after heating, iridescent
| references  = <ref name=Webmin>{{Cite web|last1=Barthelmy|first1=David|year=2014|url=http://www.webmineral.com/data/Bornite.shtml|access-date=12 August 2022|title = Bornite Mineral Data|website=Webmineral.com}}</ref><ref name=Handbook>{{cite web |last1=Anthony |first1=John W. |last2=Bideaux |first2=Richard A. |last3=Bladh |first3=Kenneth W. |last4=Nichols |first4=Monte C. |title=Bornite |url=http://www.handbookofmineralogy.org/pdfs/bornite.pdf |website=Handbook of Mineralogy |publisher=Mineral Data Publishing |access-date=12 August 2022 |date=2005}}</ref><ref name=Mindat>{{mindat|id=727|title=Bornite|access-date=12 August 2022}}</ref>
}}

'''Bornite''', also known as '''peacock ore''', is a [[sulfide mineral]] with [[chemical composition]] {{chem2|[[copper|Cu]]5[[iron|Fe]][[sulfur|S]]4}} that [[crystallization|crystallizes]] in the [[orthorhombic crystal system|orthorhombic system]] (pseudo-cubic). It is an important copper ore.