{{Short description|Rare copper aluminium arsenate mineral}} {{Infobox mineral | name = Urusovite | image = Small_brown_crystals_of_thermaerogenite_(a).png | alt = | caption = Numerous small brown crystals of thermaerogenite on colourless to white langbeinite with light blue urusovite, iron-black tenorite and minor green ericlaxmanite | category = Arsenate mineral | formula = CuAlAsO<sub>5</sub> | IMAsymbol = Uusv<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> | strunz = 8.BB.60 | dana = 38.05.09.02 | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P''2<sub>1</sub>/c | unit cell = a = 7.314&nbsp;Å, b = 10.223&nbsp;Å <br/>c = 5.576&nbsp;Å; β = 99.79°; Z&nbsp;=&nbsp;4 | color = Light green | colour = | habit = | twinning = | cleavage = Perfect | fracture = Brittle | tenacity = | mohs = 4 | luster = Vitreous (glassy) | streak = White | diaphaneity = Translucent | gravity = | density = | polish = | opticalprop = Biaxial (−) | refractive = n<sub>α</sub> = 1.672 n<sub>β</sub> = 1.718 n<sub>γ</sub> = 1.722 | birefringence = δ = 0.050 | pleochroism = | 2V = | dispersion = r > v strong | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references =<ref name=webmin>[http://webmineral.com/data/Urusovite.shtml Urusovite Data] on [http://webmineral.com Webmineral]</ref><ref name=Mindat>[http://www.mindat.org/min-7070.html Urusovite] on [http://www.mindat.org Mindat]</ref> }} '''Urusovite''' is a rare copper aluminium arsenate mineral with formula: CuAlAsO<sub>5</sub>. It is a monoclinic-prismatic light green mineral.

Its type locality and only reported occurrence is in the Novaya fumarole, Second scoria cone, North Breach, Great Fissure eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia.<ref name=webmin/><ref name=Mindat/> It was named after Vadim Sergeevich Urusov, crystal chemist of Moscow State University.<ref>{{Cite web |url=http://www.mineralogicalassociation.ca/doc/alpha_u.pdf |title=Mineralogicalassociation - Urusovite Data |access-date=2013-06-12 |archive-date=2016-03-04 |archive-url=https://web.archive.org/web/20160304061242/http://www.mineralogicalassociation.ca/doc/alpha_u.pdf |url-status=dead }}</ref> It was approved by the International Mineralogical Association in 1998.<ref name=webmin/>

==References== {{Reflist}}

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Category:Copper(II) minerals Category:Aluminium minerals Category:Arsenate minerals Category:Monoclinic minerals Category:Minerals in space group 14