urusovite

{{Short description|Rare copper aluminium arsenate mineral}}

{{Infobox mineral

| name = Urusovite

| image =

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| category = Arsenate mineral

| formula = CuAlAsO₅

| IMAsymbol = Uusv{{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}}

| strunz = 8.BB.60

| dana = 38.05.09.02

| system = Monoclinic

| class = Prismatic (2/m)
(same H-M symbol)

| symmetry = P2₁/c

| unit cell = a = 7.314 Å, b = 10.223 Å
c = 5.576 Å; β = 99.79°; Z = 4

| color = Light green

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| cleavage = Perfect

| fracture = Brittle

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| mohs = 4

| luster = Vitreous (glassy)

| streak = White

| diaphaneity = Translucent

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| opticalprop = Biaxial (−)

| refractive = n_α = 1.672 n_β = 1.718 n_γ = 1.722

| birefringence = δ = 0.050

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| dispersion = r > v strong

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| references =[http://webmineral.com/data/Urusovite.shtml Urusovite Data] on [http://webmineral.com Webmineral][http://www.mindat.org/min-7070.html Urusovite] on [http://www.mindat.org Mindat]

}}

Urusovite is a rare copper aluminium arsenate mineral with formula: CuAlAsO₅. 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. It was named after Vadim Sergeevich Urusov, crystal chemist of Moscow State University.[http://www.mineralogicalassociation.ca/doc/alpha_u.pdf Mineralogicalassociation - Urusovite Data] It was approved by the International Mineralogical Association in 1998.