# Coronadite

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Coronadite
> Markdown URL: https://mediated.wiki/source/Coronadite.md
> Source: https://en.wikipedia.org/wiki/Coronadite
> Source revision: 1312702180
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Lead manganese oxide mineral}}
{{Infobox mineral
| name        = coronadite
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| image       = RM2019-Coronadita.jpg 
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| caption     = Coronadita 
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| category    = hydroxides
| formula     = Pb(Mn<sup>4+</sup><sub>6</sub>Mn<sup>3+</sup><sub>2</sub>)O<sub>16</sub>
| IMAsymbol   = Cor<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|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|url-access=subscription}}</ref>  
| molweight   =  933.55
| strunz      = 4/D.08-70
| dana        = 7.9.1.4
| system      = monoclinic
| class       = 
| symmetry    = ''I''2/''m'' 
| unit cell   =  a = 9.938, b = 2.8678, c = 9.834, Z = 1; β = 90.39° V = 280.26
| color       = 
| colour      = dark grey to black
| habit       = botryoidal; fibrous
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| mohs        = 4.5–5
| luster      = submetallic
| streak      = brownish black
| diaphaneity = opaque
| gravity     = 
| density     = 5.44
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| refractive  = 2.72?
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| pleochroism = brown-grey
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| impurities  = Fe, Al
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}}
'''Coronadite''' is the [lead](/source/lead) [endmember](/source/endmember) of the [coronadite group](/source/coronadite_group), a family of tectomanganates with a 2 × 2 tunnel structure. The mineral was named after [Francisco Vasquez de Coronado](/source/Francisco_Vasquez_de_Coronado) who was an explorer of southwest US. The name was made up by [Waldemar Lindgren](/source/Waldemar_Lindgren) in 1905.<ref>{{cite web |title=Coronadite Mineral Data |url=http://webmineral.com/data/Coronadite.shtml |website=webmineral.com}}</ref> It is chemically related to [ferricoronadite](/source/ferricoronadite), an {{chem2|Fe3+}} analogue, as well as [cryptomelane](/source/cryptomelane), [hollandite](/source/hollandite), [manjiroite](/source/manjiroite) and [strontiomelane](/source/strontiomelane).

<gallery widths="200px" heights="200px" perrow="1">
File:Hollandite.jpg|Polyhedral representation of the 2 × 2 tunnel structure of coronadite. The black atoms represent Pb.
</gallery>

==References==
{{Reflist}}

Category:Manganese minerals
Category:Lead minerals
Category:Minerals described in 1904

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