# Scawtite

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Scawtite
> Markdown URL: https://mediated.wiki/source/Scawtite.md
> Source: https://en.wikipedia.org/wiki/Scawtite
> Source revision: 1140520933
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{infobox mineral
| name        = Scawtite
| image       = Scawtite.jpg
| alt         = 
| caption     = 
| category    = [Silicate mineral](/source/Silicate_mineral)
| formula     = Ca<sub>7</sub>(Si<sub>3</sub>O<sub>9</sub>)<sub>2</sub>CO<sub>3</sub>·2H<sub>2</sub>O
| IMAsymbol   = Scw<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      = 9.CK.15
| dana        = 64.2.1.1
| system      = [Monoclinic](/source/Monoclinic)
| class       = Prismatic (2/m) <br/><small>(same [H-M symbol](/source/H-M_symbol))</small>
| symmetry    = ''C2/m''
| unit cell   = a = 10.12&nbsp;[Å](/source/%C3%85ngstr%C3%B6m), b = 15.18&nbsp;Å <br/>c = 6.62&nbsp;Å; β = 100.55°; Z&nbsp;=&nbsp;2
| color       = Colorless
| habit       = Platy - micaceous, parallel to radiating clusters
| twinning    = 
| cleavage    = Perfect on {001}, poor on {010}
| fracture    = 
| tenacity    = 
| mohs        = 4–5
| luster      = Vitreous
| streak      = 
| diaphaneity = Transparent
| gravity     = 2.77
| density     = 
| polish      = 
| opticalprop = Biaxial (+)
| refractive  = n<sub>α</sub> = 1.597 - 1.603 n<sub>β</sub> = 1.606 - 1.609 n<sub>γ</sub> = 1.618 - 1.621
| birefringence = δ = 0.021
| pleochroism = 
| 2V          = Measured from 74° to 78°
| dispersion  = 
| extinction  = 
| length fast/slow =
| fluorescence = 
| absorption  = 
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| impurities  = 
| alteration  = 
| other       = 
| prop1       = 
| prop1text   = 
| references = <ref name=HBM>[http://www.handbookofmineralogy.com/pdfs/scawtite.pdf Scawtite in the Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-3552.html Scawtite on Mindat.org]</ref><ref name=Webmin>[http://www.webmineral.com/data/Scawtite.shtml#.VoaFYrY4HRY Scawtite data on Webmineral]</ref>
}}
'''Scawtite''' is a hydrous [calcium](/source/calcium) [silicate mineral](/source/silicate_mineral) with [carbonate](/source/carbonate), formula: Ca<sub>7</sub>(Si<sub>3</sub>O<sub>9</sub>)<sub>2</sub>CO<sub>3</sub>·2H<sub>2</sub>O. It crystallizes in the [monoclinic crystal system](/source/monoclinic_crystal_system) as thin plates or flat prisms.<ref name=Mindat/>

Scawtite was first described in 1929 for an occurrence at [Scawt Hill](/source/Scawt_Hill) in [Northern Ireland](/source/Northern_Ireland).<ref name=Mindat/> 

Scawtite occurs as in [skarn](/source/skarn)s and [hydrothermal](/source/hydrothermal) [veins](/source/Vein_(geology)) in [limestone](/source/limestone). Associated minerals include [melilite](/source/melilite), [spurrite](/source/spurrite), [tobermorite](/source/tobermorite), [thomsonite](/source/thomsonite), [larnite](/source/larnite), [grossular](/source/grossular), [bultfonteinite](/source/bultfonteinite), [calcite](/source/calcite), [analcime](/source/analcime), [foshagite](/source/foshagite) and [hillebrandite](/source/hillebrandite).<ref name=HBM/>

==References==
{{Reflist}}

{{silicate-mineral-stub}}

Category:Silicate minerals
Category:Monoclinic minerals
Category:Minerals in space group 12

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