{{Short description|Mineral}} {{Infobox mineral | name = Hoelite | boxwidth = | boxbgcolor = | image = Hoelite, sulfur - Carolaschacht Mine, Freital, Saxony, Germany.jpg | imagesize = 260px | alt = | caption = Yellow acicular crystals of hoelite (picture size: 10 mm) | category = [[Organic mineral]] | formula = C<sub>14</sub>H<sub>8</sub>O<sub>2</sub> | IMAsymbol = Hoe<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 = 10.CA.15 | dana = 50.4.2.1 | system = [[Monoclinic]] | class = Prismatic (2/m) <br/><small>(same [[H-M symbol]])</small> | symmetry = ''P2''<sub>1</sub>/a | unit cell = a = 15.81&nbsp;[[Ångström|Å]], b = 3.967&nbsp;Å <br/>c = 7.876&nbsp;Å; β = 102.67°; <br/>Z&nbsp;=&nbsp;2 | color = Yellow, yellowish green | colour = | habit = Acicular clusters; pseudo-orthorhombic | twinning = | cleavage = Good | fracture = | tenacity = | mohs = | luster = | streak = Light yellow | diaphaneity = Semitransparent | gravity = 1.42 | density = | polish = | opticalprop = Biaxial (+) | refractive = n<sub>α</sub>≈1.75, n<sub>β</sub>≈1.75, n<sub>γ</sub>≈2.0 | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = <ref name=HBM>{{cite encyclopedia|title=Hoelite|editor-last1=Anthony|editor-first1=John W.|editor-last2=Bideaux|editor-first2=Richard A.|editor-last3=Bladh|editor-first3=Kenneth W.|editor-last4=Nichols|editor-first4=Monte C.|encyclopedia=Handbook of Mineralogy|publisher=Mineralogical Society of America|location=Chantilly, VA|url=http://www.handbookofmineralogy.com/pdfs/hoelite.pdf|accessdate=12 September 2017|archive-date=4 March 2016|archive-url=https://web.archive.org/web/20160304061756/http://www.handbookofmineralogy.com/pdfs/hoelite.pdf|url-status=dead}}</ref><ref name=Mindat>{{cite web|last1=Barthelmy|first1=Dave|title=Hoelite|url=https://www.mindat.org/min-1915.html|publisher=Mindat.org|accessdate=12 September 2017}}</ref> }} '''Hoelite''' is a [[mineral]], discovered in 1922 at Mt. Pyramide, [[Spitsbergen]], Norway and named after Norwegian geologist [[Adolf Hoel]] (1879–1964). Its chemical formula is C<sub>14</sub>H<sub>8</sub>O<sub>2</sub> ([[9,10-anthraquinone]]).<ref name=HBM/>

It is a very rare [[organic mineral]] which occurs in [[Coal-seam fire|coal fire]] environments in association with [[sal ammoniac]] and [[native sulfur]].<ref name=HBM/>

==References== {{Commons category|Hoelite}} {{Reflist}}

[[Category:Organic minerals]] [[Category:Monoclinic minerals]] [[Category:Minerals in space group 14]] [[Category:Minerals described in 1922]]

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