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{{Infobox mineral
| name = Hauerite
'''Hauerite''' is a [[manganese]] [[sulfide]] mineral with the [[chemical formula]] [[manganese|Mn]][[sulfur|S]]<sub>2</sub>. It forms reddish brown or black octahedral [[crystal]]s and it is usually found associated with the sulfides of other transition metals such as [[rambergite]]. It was discovered in [[Austria]] and named after the mineralogists, J.R. Hauer and F. Hauer.▼
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| image = Hauerite-mun05-64a.jpg
| imagesize = 260px
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| caption =
| category = [[Sulfide mineral]], [[pyrite group]]
| formula = MnS<sub>2</sub>
| IMAsymbol = Hr<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|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 = 119.07 g/mol
| strunz = 2.EB.05a
| dana =
| system = [[Cubic crystal system|Cubic]]
| class = Diploidal (m{{overline|3}}) <br/>[[H–M symbol]]: (2/m {{overline|3}})
| symmetry = ''Pa''{{overline|3}}
| unit cell = a = 6.107 Å; Z = 4
| color = Reddish brown or brownish black
| colour =
| habit = Octahedral crystals and globular aggregates
| twinning =
| cleavage = {100} Perfect, {010} Perfect, Perfect on {001}
| fracture = Uneven to subconchoidal
| tenacity = Brittle
| mohs = 4
| luster = Metallic-adamantine
| streak = Reddish brown
| diaphaneity = Opaque to subtranslucent
| gravity = 3.463
| density =
| polish =
| opticalprop = Isotropic
| refractive = n = 2.69
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| references = <ref name=HBM>{{cite web |last1=Anthony |first1=John W. |last2=Bideaux |first2=Richard A. |last3=Bladh |first3=Kenneth W. |last4=Nichols |first4=Monte C. |title=Hauerite |url=http://www.handbookofmineralogy.org/pdfs/hauerite.pdf |website=Handbook of Mineralogy |publisher=Mineral Data Publishing |access-date=1 August 2022 |date=2005}}</ref><ref name=Webmin>{{Cite web|last1=Barthelmy|first1=David|year=2014|url=http://www.webmineral.com/data/Hauerite.shtml|access-date=1 August 2022|title = Hauerite Mineral Data|website=Webmineral.com}}</ref><ref name=Mindat>{{mindat|id=1831|title=Hauerite|access-date=1 August 2022}}</ref>
}}
▲'''Hauerite''' is a [[manganese]] [[sulfide]] mineral with the [[chemical formula]] [[manganese|Mn]][[sulfur|S]]<sub>2</sub>. It forms reddish brown or black octahedral [[crystal]]s with the [[pyrite]] structure and it is usually found associated with the sulfides of other transition metals such as [[rambergite]]. It
{{mineral-stub}}▼
It was discovered in [[Austro-Hungarian Monarchy]] in Kalinka (now [[Vígľašská Huta-Kalinka]] village) sulfur deposit near Detva in what is now [[Slovakia]] in 1846 and named after the Austrian geologists, [[Joseph Ritter von Hauer]] (1778–1863) and [[Franz Ritter von Hauer]] (1822–1899).<ref name=HBM/><ref name=Mindat/>
It is found in Texas, US; the Ural Mountains of Russia, and Sicily, Italy.<ref>{{Cite book |last= |first= |title=Rocks and Minerals |publisher=[[DK publishers]] |year=2012 |isbn=978-1-4093-8659-9 |editor-last=Star |editor-first=Fleur}}</ref>
Under high pressure conditions (P>11 GPa), Hauerite undergoes a large collapse in unit cell volume (22%) driven by a spin-state transition.<ref>[http://www.pnas.org/content/111/14/5106.abstract Kimber, S.A.J., et al., ''Giant pressure-induced volume collapse in the pyrite mineral MnS<sub>2</sub>,'' PNAS, April 8, 2014, vol. 111, no. 14, pp. 5106–5110]</ref>
==References==
{{Reflist}}
{{Commons}}
{{Manganese minerals}}
[[Category:Manganese minerals]]
[[Category:Sulfide minerals]]▼
[[Category:Pyrite group]]
[[Category:Minerals in space group 205]]
[[Category:Minerals described in 1846]]
▲{{sulfide-mineral-stub}}
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