{{Short description|Rare sulfate mineral}} {{infobox mineral | name = Millosevichite | image = Millosevichite-629135.jpg | alt = | caption = Porous yellow millosevichite. Dimensions: 14 mm × 10 mm × 8 mm. Locality: Kladno Mine (Nejedlý I Mine; Zdeněk Nejedlý Mine; Schoeller Mine; Schöller Mine), Libušin, Kladno, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic. | category = Sulfate mineral | formula = Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> | IMAsymbol = Msv<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|url-access=subscription}}</ref> | strunz = 7.AB.05 | dana = | system = Trigonal | class = Rhombohedral ({{overline|3}}) <br>H-M symbol: ({{overline|3}}) | symmetry = ''R''{{overline|3}} | unit cell = a = 8.05 Å, c = 21.19 Å; Z = 6 | color = Indigo, bright red, brick-red | habit = Granular aggregates of minute crystals; stalactitic porous masses | twinning = | cleavage = | fracture = | tenacity = | mohs = 1.5 | luster = Vitreous | streak = | diaphaneity = Semitransparent | gravity = 1.72 measured | density = | polish = | opticalprop = Uniaxial (+) | refractive = n<sub>ω</sub> = 1.500 n<sub>ε</sub> = 1.515 | birefringence = δ = 0.015 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = Hygroscopic | references = <ref name=HBM>[http://www.handbookofmineralogy.org Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-2713.html Mindat]</ref><ref>[http://webmineral.com/data/Millosevichite.shtml Webmineral]</ref> }} '''Millosevichite''' is a rare sulfate mineral with the chemical formula Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>.<ref name=Mindat/> Aluminium is often substituted by iron. It forms finely crystalline and often porous masses.
It was first described in 1913 for an occurrence in Grotta dell'Allume, Porto Levante, Vulcano Island, Lipari, Aeolian Islands, Sicily. It was named for Italian mineralogist Federico Millosevich (1875–1942) of the University of Rome.<ref name=HBM/>
The mineral is mainly known from burning coal dumps, acting as one of the main minerals forming sulfate crust. It can be also found in volcanic fumeroles (solfatara environments).<ref name=HBM/><ref>Chesnokov B. V. and Shcherbakova E. P. 1991: Mineralogiya gorelykh otvalov Chelyabinskogo ugolnogo basseina – opyt mineralogii tekhnogenesa. Nauka, Moscow</ref> It occurs with native sulfur, sal ammoniac, letovicite, alunogen and boussingaultite.<ref name=HBM/>
== References == {{reflist}}
Category:Sulfate minerals Category:Trigonal minerals Category:Minerals in space group 148
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