# Zykaite

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Zykaite
> Markdown URL: https://mediated.wiki/source/Zykaite.md
> Source: https://en.wikipedia.org/wiki/Zykaite
> Source revision: 1262687042
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Infobox mineral
| name        = Zykaite
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| image       = Zýkaite.jpg
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| caption     = Zykaite found in the [Czech Republic](/source/Czech_Republic)
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| formula     = Fe<sup>3+</sup><sub>4</sub>(AsO<sub>4</sub>)<sub>3</sub>(SO<sub>4</sub>)(OH)·15(H<sub>2</sub>O)
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| color       = Grey-white, Yellow-white, Green-white
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| fracture    = Irregular, Uneven
| tenacity    = Waxy
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| mohs        = 2
| luster      = Dull
| streak      = Pale yellow
| diaphaneity = Translucent
| gravity     = 2.5
| density     = 2.50 g/cm<sup>3</sup>
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'''Zykaite''' or '''zýkaite''' is a grey-white [mineral](/source/mineral) consisting of [arsenic](/source/arsenic), [hydrogen](/source/hydrogen), [iron](/source/iron), [sulfur](/source/sulfur) and [oxygen](/source/oxygen) with formula: Fe<sup>3+</sup><sub>4</sub>(AsO<sub>4</sub>)<sub>3</sub>(SO<sub>4</sub>)(OH)·15(H<sub>2</sub>O).<ref name=Webmin>[http://webmineral.com/data/Zykaite.shtml Webmineral data]</ref> This dull mineral is very soft with a [Mohs hardness](/source/Mohs_hardness) of only 2 and a [specific gravity](/source/specific_gravity) of 2.5. It is [translucent](/source/translucent) and crystallizes in the [orthorhombic](/source/orthorhombic) [crystal system](/source/crystal_system).<ref name=HB>[http://rruff.geo.arizona.edu/doclib/hom/zykaite.pdf Handbook of Mineralogy]</ref>

It is in the Sanjuanite-Destinezite mineral group, containing group members [Destinezite](/source/Destinezite), [Sanjuanite](/source/Sanjuanite), and [Sarmientite](/source/Sarmientite).

Its common [associates](/source/associate_(geology)) include [limonite](/source/limonite), [gypsum](/source/gypsum), [scorodite](/source/scorodite), [quartz](/source/quartz) and [arsenopyrite](/source/arsenopyrite).<ref name=HB/> It is found in the [Czech Republic](/source/Czech_Republic), [New Zealand](/source/New_Zealand), [Poland](/source/Poland) and [Germany](/source/Germany).<ref name=Mindat/>

Zykaite was first described in 1978 for an occurrence in the Safary mine, Kutná Hora, [Bohemia](/source/Bohemia), [Czech Republic](/source/Czech_Republic) and named in honour of [Vaclav Zyka](/source/Vaclav_Zyka) (born 1926), a Czech [geochemist](/source/geochemist).<ref name=HB/><ref name=Mindat>[http://www.mindat.org/min-4437.html Mindat.org]</ref>

==References==
{{Reflist}}

Category:Sulfate minerals
Category:Arsenic minerals
Category:Orthorhombic minerals

{{Sulfate-mineral-stub}}

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