Linnaeite

{{Short description|Cobalt sulfide mineral}} {{Infobox mineral | name = Linnaeite | boxwidth = | boxbgcolor = | image = Linnaeite - USGS Mineral Specimens 722.jpg | imagesize = | alt = | caption = Linnaeite samples and polished section | category = Sulfide mineral <br />Thiospinel group <br />Spinel structural group | formula = Co⁺²Co⁺³₂S₄ | IMAsymbol = Lin<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 = | strunz = 2.DA.05 | dana = | system = Cubic | class = Hexoctahedral (m{{overline|3}}m) <br/>H-M symbol: (4/m {{overline|3}} 2/m) | symmetry = ''F''d{{overline|3}}m | unit cell = a = 9.43&nbsp;Å; Z&nbsp;=&nbsp;8 | color = Steel gray to gray violet | colour = | habit = As octahedral crystals; massive, granular | twinning = On {111} | cleavage = Imperfect on {001} | fracture = Subconchoidal | tenacity = | mohs = 4.5–5.5 | luster = Metallic | streak = Grayish-black | diaphaneity = Opaque | gravity = 4.8–5.8 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = Tarnishes in air | other = | prop1 = | prop1text = | references = <ref name=Mindat>[http://www.mindat.org/min-2409.html Linnaeite on Mindat]</ref><ref name=Webmin>[http://www.webmineral.com/data/Linnaeite.shtml Linnaeite data on Webmineral]</ref><ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/linnaeite.pdf Linnaeite on the Handbook of Mineralogy]</ref> }}

'''Linnaeite''' is a cobalt sulfide mineral with the composition Co⁺²Co⁺³₂S₄. It was discovered in 1845 in Västmanland, Sweden, and was named to honor Carl Linnaeus (1707–1778).<ref name=Mindat/>

Linnaeite forms a series with polydymite, Ni⁺²Ni⁺³₂S₄.<ref>[http://www.mindat.org/min-8710.html Linnaeite-Polydymite Series]</ref> Linnaeite is found in hydrothermal veins with other cobalt and nickel sulfides in many localities around the world.<ref name=HBM/>

==References== {{Reflist}}

* {{Cite book |first=Walter |last=Schumann |series=BLV Bestimmungsbuch |title=Mineralien aus aller Welt |edition=2 |year=1991 |isbn=3-405-14003-X |pages=223 }}

{{Carl Linnaeus}}

Category:Cobalt minerals Category:Thiospinel group Category:Cubic minerals Category:Minerals in space group 227 Category:Commemoration of Carl Linnaeus

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