# Cahnite

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> Markdown URL: https://mediated.wiki/source/Cahnite.md
> Source: https://en.wikipedia.org/wiki/Cahnite
> Source revision: 1335850175
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{{Short description|Mineral}}
{{Infobox mineral
| name        = Cahnite
| image       = Cahnite-Rhodonite-245680.jpg
| imagesize   = 260px
| alt         = 
| caption     = Cahnite on rhodonite
| category    = [Borate minerals](/source/Borate_minerals)
| formula     = Ca<sub>2</sub>B[AsO<sub>4</sub>](OH)<sub>4</sub>
| IMAsymbol=Cah<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      = 6.AC.70
| dana        = 
| system      = [Tetragonal](/source/Tetragonal)
| class       = Disphenoidal ({{overline|4}}) <br/><small>(same [H-M symbol](/source/H-M_symbol))</small>
| symmetry    = ''I''{{overline|4}}
| unit cell   = 
| color       = Colorless to white
| colour      = 
| habit       = 
| twinning    = 
| cleavage    = Perfect<br/>On {110}
| fracture    = 
| tenacity    = Brittle
| mohs        = 3
| luster      = Vitreous
| streak      = 
| diaphaneity = Transparent
| gravity     = 
| density     = 3.156&nbsp;g/cm<sup>3</sup>
| polish      = 
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| 2V          = 
| dispersion  = 
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| fluorescence = 
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| melt        = 
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| prop1       = 
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| references  = <ref>[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Cahnite Mineralienatlas]</ref>
}}
'''Cahnite''' ('''Cahnit''' in German, '''Cahnita''' in Spanish, '''Канит''' in Russian<ref name=min851>[http://www.mindat.org/min-851.html Mindat data sheet for Cahnite.]</ref>) is a brittle white or colorless [mineral](/source/mineral) that has perfect cleavage and is usually transparent.  It usually forms tetragonal-shaped crystals and it has a hardness of 3 mohs.<ref name=webmin>[https://www.webmineral.com/data/Cahnite.shtml Mineral Data sheet for Cahnite.]</ref><ref name=coll>{{Cite web |url=http://www.mineralcollecting.org/data/allcategory.cgi?a=Cahnite&m=ww&ex=&a=c&c=&d=&l=&h=&v=&s=&r=&el=&pc=&elt=&pct=&elr=&pcr=&elf=&pcf=&str=&dna=&fml= |title=Database entry from Mineral Collecting. |access-date=2008-05-19 |archive-date=2016-03-03 |archive-url=https://web.archive.org/web/20160303192604/http://www.mineralcollecting.org/data/allcategory.cgi?a=Cahnite&m=ww&ex=&a=c&c=&d=&l=&h=&v=&s=&r=&el=&pc=&elt=&pct=&elr=&pcr=&elf=&pcf=&str=&dna=&fml= |url-status=dead }}</ref>  Cahnite was discovered in the year 1921.<ref name=min851/>  It was named Cahnite to honor Lazard Cahn (1865–1940), who was a mineral collector and dealer.<ref name=webmin/> It is usually found in the Franklin Mine, in [Franklin, New Jersey](/source/Franklin%2C_New_Jersey),<ref name="coll" /><ref name="webmin" />  but has also been found in [Japan](/source/Japan)<ref>[http://sciencelinks.jp/j-east/article/200219/000020021902A0418079.php Article stating that veins of cahnite were found in Okayama Prefecture.] {{webarchive|url=https://web.archive.org/web/20120217004059/http://sciencelinks.jp/j-east/article/200219/000020021902A0418079.php |date=2012-02-17 }}</ref> as well as in the Vallerano quarries in Rome, Italy.<ref>{{Cite web |title=Cahnite |url=https://www.mindat.org/min-851.html |access-date=2022-06-26 |website=www.mindat.org}}</ref> The geological environment that it occurs in is in pegmatites cutting a changed zinc orebody.<ref name="min851" /><ref name="webmin" /><ref name="coll" />
The [chemical formula](/source/chemical_formula) for cahnite is Ca<sub>2</sub>B[AsO<sub>4</sub>](OH)<sub>4</sub>.<ref name=coll/><ref>{{Cite web |url=http://database.iem.ac.ru/mincryst/s_carta.php?CAHNITE+695 |title=Database entry for Cahnite from Mincryst. |access-date=2008-05-19 |archive-date=2021-01-09 |archive-url=https://web.archive.org/web/20210109194027/http://database.iem.ac.ru/mincryst/s_carta.php?CAHNITE+695 |url-status=dead }}</ref><ref>[http://www.h5.dion.ne.jp/~nspicnic/mine/database/cahnitee.htm Database entry for Cahnite from Japanese database.]</ref> It is made up of 26.91% [calcium](/source/calcium), 3.63% [boron](/source/boron), 25.15% [arsenic](/source/arsenic), 1.35% [hydrogen](/source/hydrogen), and 42.96% [oxygen](/source/oxygen).  It has a molecular weight of 297.91 grams.<ref name=coll/> Cahnite is not radioactive.<ref name=webmin/> Cahnite is associated with these other minerals: [willemite](/source/willemite), [rhodonite](/source/rhodonite), [pyrochroite](/source/pyrochroite), [hedyphane](/source/hedyphane), [datolite](/source/datolite), and [baryte](/source/baryte).<ref name=min851/>

==References==
{{reflist}}

Category:Arsenate minerals
Category:Calcium minerals
Category:Borate minerals
Category:Tetragonal minerals
Category:Minerals in space group 82
Category:Minerals described in 1921

{{mineral-stub}}

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