# Alarsite

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> Markdown URL: https://mediated.wiki/source/Alarsite.md
> Source: https://en.wikipedia.org/wiki/Alarsite
> Source revision: 1255128642
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{{Infobox mineral
| name= Alarsite
| boxwidth = 
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| image       = Alarsite.jpg
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| alt         = 
| caption     = Alarsite crystals found at Tolbachik
| category    = 
| formula     = 
|IMAsymbol=Ars<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      = 
| dana        = 
| system      = trigonal
| class       = aluminium arsenate
| symmetry    = ''P3<sub>1</sub>21'' (no. 152) or ''P3<sub>2</sub>21'' (no. 154)
| unit cell   = 
| color       = 
| colour      = colorless with pale yellow tints
| habit       = 
| twinning    = 
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| tenacity    = 
| toughness   = 
| mohs        = 5-5.5 
| luster      = vitreous luster
| streak      = 
| diaphaneity = 
| gravity     = 3.32.
| density     = 
| polish      = 
| opticalprop = 
| refractive  = nω = 1.596 and nε = 1.608.
| birefringence = 
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| other       = 
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}}

'''Alarsite''' (AlAsO<sub>4</sub>) is an [aluminium](/source/aluminium)  [arsenate mineral](/source/arsenate_mineral) with its name derived from its composition: aluminium and arsenate.<ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/alarsite.pdf Handbook of Mineralogy]</ref> It occurs as brittle subhedral grains which exhibit [trigonal](/source/trigonal) symmetry. It has a [Mohs hardness](/source/Mohs_hardness) of 5-5.5 and a specific gravity of 3.32. It is semitransparent, colorless with pale yellow tints and shows a vitreous luster. It is optically uniaxial (+) with [refractive indices](/source/Index_of_refraction) of n<sub>ω</sub> = 1.596 and n<sub>ε</sub> = 1.608.

It was reported from [fumarole](/source/fumarole)s in the [Tolbachik](/source/Tolbachik) volcano, [Kamchatka](/source/Kamchatka), [Far Eastern Region](/source/Far_Eastern_Federal_District), Russia.<ref>[http://www.mindat.org/min-94.html Fact sheet from Mindat.org]</ref><ref>[http://www.webmineral.com/data/Alarsite.shtml Fact sheet from Webmineral.com]</ref> It occurs in association with fedotovite, klyuchevskite, [lammerite](/source/lammerite), nabokoite, atlasovite, [langbeinite](/source/langbeinite), [hematite](/source/hematite) and [tenorite](/source/tenorite).<ref name=HBM/>

== References ==
{{Reflist}}

Category:Arsenate minerals
Category:Aluminium minerals
Category:Trigonal minerals
Category:Minerals in space group 152 or 154
Category:Geology of Russia

{{mineral-stub}}

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Adapted from the Wikipedia article [Alarsite](https://en.wikipedia.org/wiki/Alarsite) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Alarsite?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.