# Claudetite

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> Markdown URL: https://mediated.wiki/source/Claudetite.md
> Source: https://en.wikipedia.org/wiki/Claudetite
> Source revision: 1329322562
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Arsenic oxide mineral}}
{{Infobox mineral
| name        = Claudetite
| category    = [Oxide minerals](/source/Oxide_minerals)
| boxwidth    = 
| boxbgcolor  = 
| image       = Claudetite-700910.jpg
| caption     = 
| formula     = As<sub>2</sub> O<sub>3</sub>
| IMAsymbol   = Ctd<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      = 4.CB.45
| system      = [Monoclinic](/source/Monoclinic)
| class       = Prismatic (2/m) <br/><small>(same [H-M symbol](/source/H-M_symbol))</small>
| symmetry    = ''P2''<sub>1</sub>/n
| unit cell   = a = 5.33&nbsp;Å, b = 12.98&nbsp;Å, <br/>c = 4.54&nbsp;Å; β = 94.27°; Z&nbsp;=&nbsp;4
| color       = Colorless to white
| habit       = Thin tabular crystals, fibrous crusts
| twinning    = Contact or penetration on {100}
| cleavage    = Perfect on {010} micaceous
| fracture    = Splintery
| tenacity    = Flexible
| mohs        = 2.15
| luster      = Vitreous, pearly on cleavage surfaces
| refractive  = n<sub>α</sub> = 1.870 n<sub>β</sub> = 1.920 n<sub>γ</sub> = 2.010
| opticalprop = Biaxial (−)
| birefringence = δ = 0.140
| 2V          = 58° (measured)
| pleochroism = 
| streak      = 
| gravity     = 4.14–4.15
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| diaphaneity = Transparent
| other       = 
| references  = <ref name= "Handbook">[https://rruff.geo.arizona.edu/doclib/hom/claudetite.pdf Handbook of Mineralogy]</ref><ref name=Webmin>[https://webmineral.com/data/Claudetite.shtml Claudetite data on Webmineral]</ref><ref name=Mindat>[http://www.mindat.org/min-1060.html Claudetite on Mindat]</ref>
}}
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'''Claudetite''' is an arsenic [oxide mineral](/source/oxide_mineral) with chemical formula [As<sub>2</sub>O<sub>3</sub>](/source/arsenic_trioxide). Claudetite is formed as an [oxidation](/source/Redox) product of arsenic [sulfides](/source/Sulfide_mineral) and is colorless or white. It can be associated with [arsenolite](/source/arsenolite) (the cubic form of As<sub>2</sub>O<sub>3</sub>) as well as [realgar](/source/realgar) (As<sub>4</sub>S<sub>4</sub>), [orpiment](/source/orpiment) (As<sub>2</sub>S<sub>3</sub>) and [native sulfur](/source/native_sulfur).<ref name= "Handbook"/>

It was first described in 1868 for an occurrence in the San Domingo mines, [Algarve](/source/Algarve), [Portugal](/source/Portugal). It was first described by and named for the French chemist [Frederick Claudet](/source/Frederick_Claudet).<ref name=Webmin/>

== References ==
{{reflist}}

Category:Arsenic minerals
Category:Oxide minerals
Category:Monoclinic minerals
Category:Minerals in space group 14

{{oxide-mineral-stub}}

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