# Dundasite

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> Markdown URL: https://mediated.wiki/source/Dundasite.md
> Source: https://en.wikipedia.org/wiki/Dundasite
> Source revision: 1320116946
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{{Short description|Lead aluminium carbonate mineral}}
{{Infobox mineral
| name        = Dundasite
| category    = [Carbonate mineral](/source/Carbonate_mineral)
| boxwidth    = 
| boxbgcolor  = 
| image       = Dundasite and Crocoite.jpg
| imagesize   = 260px
| caption     = Dundasite (the white mineral) and [crocoite](/source/crocoite) from Dundas, Tasmania. Field of view is 5mm.
| formula     = PbAl<sub>2</sub>[(OH)<sub>2</sub><nowiki>|</nowiki>CO<sub>3</sub>]<sub>2</sub>&nbsp;•&nbsp;H<sub>2</sub>O
| IMAsymbol   = Dun<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      = 5.DB.10
| system      = [Orthorhombic](/source/Orthorhombic)
| class       = Dipyramidal (mmm) <br/>[H-M symbol](/source/H-M_symbol): (2/m 2/m 2/m)
| symmetry    = ''Pbmm'' (no. 51)
| unit cell   = a = 9.08, b = 16.37 <br/>c = 5.62&nbsp;[Å]; Z&nbsp;=&nbsp;4
| color       = White to very pale blue; colorless in transmitted light
| habit       = Acicular crystals typically in spherical aggregates and matted crusts
| twinning    = 
| cleavage    = Perfect On {010}
| fracture    = 
| mohs        = 2
| luster      = Vitreous to silky
| refractive  = n<sub>α</sub> = 1.603 n<sub>β</sub> = 1.716 n<sub>γ</sub> = 1.750
| opticalprop = Biaxial (-)
| birefringence = δ = 0.147
| 2V          = Measured: 30° to 40°, calculated: 54°
| pleochroism =
| streak      = White
| gravity     = 3.10 – 3.55
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| diaphaneity = Transparent
| other       = 
| references  = <ref name=Mindat>{{cite web |title = Dundasite mineral information and data |publisher = mindat.org |access-date=31 December 2020
 | url = http://www.mindat.org/min-1330.html}}</ref><ref name=Handbook>{{cite web | title = Handbook of Mineralogy: Dunasite | publisher = RRUF Database |access-date=31 December 2020 | url = http://rruff.geo.arizona.edu/doclib/hom/dundasite.pdf}}</ref><ref name=Webmin>{{cite web | title = Dundasite Mineral Data | publisher = Webmineral |access-date=31 December 2020 | url = http://www.webmineral.com/data/Dundasite.shtml}}</ref>
}}
'''Dundasite''' is a rare lead aluminium carbonate mineral. The mineral is named after the [type locality](/source/Type_locality_(geology)), [Dundas, Tasmania](/source/Dundas%2C_Tasmania), [Australia](/source/Australia).<ref name=Mindat/> The mineral was first discovered in the Adelaide Proprietary Mine.<ref name="bottrill" /> Dundasite was first described by [William Frederick Petterd](/source/William_Frederick_Petterd) in 1893.<ref>{{cite journal|date=1965|title=Volume 14|journal=The Mineralogical Magazine and Journal of the Mineralogical Society|publisher=Mineralogical Society|location=Great Britain}}</ref>

Dundasite is an uncommon secondary mineral occurring in the [oxidized](/source/Oxidation) zone of lead [ore](/source/ore) deposits.<ref name=Handbook/> It commonly overgrows [crocoite](/source/crocoite). It may also be overgrown by yellow [cerussite](/source/cerussite).<ref name="bottrill">{{cite web|url=http://www.mindat.org/forum.php?read,70,134092,134295|title=Dundasite |last=Bottrill|first=Ralph|date=April 12, 2009|accessdate=2009-10-16}}</ref> It may be associated with cerussite, [plattnerite](/source/plattnerite), [azurite](/source/azurite), [malachite](/source/malachite), [pyromorphite](/source/pyromorphite), [mimetite](/source/mimetite), [beudantite](/source/beudantite), [duftite](/source/duftite), crocoite, [gibbsite](/source/gibbsite), [allophane](/source/allophane) and [limonite](/source/limonite).<ref name=Handbook/>

Besides its type location on Tasmania, the mineral has also been found in [New Zealand](/source/New_Zealand), Mainland [Australia](/source/Australia), [China](/source/China), [Belgium](/source/Belgium), [Germany](/source/Germany), [France](/source/France), [Greece](/source/Greece), [United Kingdom](/source/United_Kingdom), [Ireland](/source/Ireland), [Italy](/source/Italy), [Austria](/source/Austria), [Czech Republic](/source/Czech_Republic), [Namibia](/source/Namibia), and the [US](/source/US).<ref name="Mindat" />

== References ==
{{commons category-inline}}
{{reflist}}

Category:Carbonate minerals
Category:Orthorhombic minerals
Category:Minerals in space group 51

{{carbonate-mineral-stub}}

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