# Connellite

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Connellite
> Markdown URL: https://mediated.wiki/source/Connellite.md
> Source: https://en.wikipedia.org/wiki/Connellite
> Source revision: 1302106921
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Halide mineral}}
{{Use dmy dates|date=April 2022}}
{{Infobox mineral
| name        = Connellite
| boxwidth    = 
| boxbgcolor  = 
| image       = Connellite-54486.jpg
| imagesize   = 260px
| alt         = 
| caption     = 
| category    = [Halide mineral](/source/Halide_mineral)
| formula     = Cu<sub>19</sub>(OH)<sub>32</sub>(SO<sub>4</sub>)Cl<sub>4</sub>·3H<sub>2</sub>O
| IMAsymbol   = Cnl<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      = 3.DA.25
| dana        = 
| system      = [Hexagonal](/source/Hexagonal_(crystal_system))
| class       = Dihexagonal dipyramidal (6/mmm) <br/>[H-M symbol](/source/H-M_symbol): (6/m 2/m 2/m)
| symmetry    = ''P''6<sub>3</sub>/mmc
| unit cell   = a = 15.78&nbsp;Å, c = 9.10&nbsp;Å; Z&nbsp;=&nbsp;1
| color       = Azure blue, blue green
| habit       = Clusters of divergent acicular crystals, fibrous, crusts
| twinning    = 
| cleavage    = None
| fracture    = Splintery
| tenacity    = Brittle
| mohs        = 3
| luster      = Vitreous
| streak      = Pale green-blue
| diaphaneity = Translucent
| gravity     = 3.36 to 3.41
| density     = 
| polish      = 
| opticalprop = Uniaxial (+)
| refractive  = n<sub>ω</sub> = 1.724 – 1.746 n<sub>ε</sub> = 1.738 – 1.758
| birefringence = δ = 0.014
| pleochroism = 
| 2V          = 
| dispersion  = 
| extinction  = 
| length fast/slow =
| fluorescence = 
| absorption  = 
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| impurities  = 
| alteration  = 
| other       = 
| references  = <ref>https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Connellite Mineralienatlas</ref><ref name=HBM>[http://rruff.info/doclib/hom/connellite.pdf Connellite in the Handbook of Mineralogy]</ref><ref name=Mindat/><ref>[http://www.webmineral.com/data/Connellite.shtml#.U7VdXvldXfI Connellite data on Webmineral]</ref>
}}
'''Connellite''' is a rare [mineral](/source/mineral) species, a [hydrous](/source/hydrous) [copper](/source/copper) [chloro](/source/chloro)-[sulfate](/source/sulfate),<ref name=EB1911>{{EB1911|wstitle=Connellite|volume=6|page=963|inline=1}}</ref> Cu<sub>19</sub>(OH)<sub>32</sub>(SO<sub>4</sub>)Cl<sub>4</sub>·3H<sub>2</sub>O, [crystal](/source/crystal)lizing in the [hexagonal](/source/hexagonal_(crystal_system)) system. It occurs as tufts of very delicate acicular crystals of a fine blue color, and is associated with other [copper](/source/copper) minerals of secondary origin, such as [cuprite](/source/cuprite) and [malachite](/source/malachite). Its occurrence in [Cornwall](/source/Cornwall), England was noted by [Philip Rashleigh](/source/Philip_Rashleigh_(1729%E2%80%931811)) in 1802, and it was first examined [chemical](/source/chemical)ly by Prof [Arthur Connell](/source/Arthur_Connell) [FRSE](/source/FRSE) in 1847, after whom it is named.<ref name=EB1911/>

The [type locality](/source/Type_locality_(geology)) is [Wheal Providence](/source/Wheal_Providence) at [Carbis Bay](/source/Carbis_Bay) in Cornwall.<ref name=Mindat>[http://www.mindat.org/min-1120.html Connellite: Connellite mineral information on Mindat.org]</ref> Outside Cornwall it has been found in over 200 locations worldwide including [Namaqualand](/source/Namaqualand) in [South Africa](/source/South_Africa) and at [Bisbee](/source/Bisbee%2C_Arizona), [Arizona](/source/Arizona) (US).<ref name=Mindat/>
thumb|center|350px|Connellite crystal structure:  ''Color code:'' Cu: copper, S: olive, O: red, Cl: green; Cell: magenta

==References==
{{Portal|Cornwall}}
{{reflist}}

Category:Copper(II) minerals
Category:Halide minerals
Category:Sulfate minerals
Category:Hexagonal minerals
Category:Minerals in space group 194

{{sulfate-mineral-stub}}

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