# Admontite

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> Markdown URL: https://mediated.wiki/source/Admontite.md
> Source: https://en.wikipedia.org/wiki/Admontite
> Source revision: 1288297385
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Borate mineral}}
{{Infobox mineral
| name = Admontite
| category = [Nesoborates](/source/Nesoborates)
| boxwidth = 
| boxbgcolor = 
| image = Admontite.jpg
| caption = 
| formula = MgB<sub>6</sub>O<sub>10</sub>·7H<sub>2</sub>O<ref name=HB/> or <br/>[Mg](/source/Magnesium)[B](/source/Boron)<sub>6</sub>[O](/source/Oxygen)<sub>7</sub>(O[H](/source/Hydrogen))<sub>6</sub>·4H<sub>2</sub>O<ref name=Mindat/>
|IMAsymbol=Amt<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>
| molweight = 
| strunz = 6.FA.15
| dana = 26.6.3.1
| system = [Monoclinic](/source/Monoclinic)
| class = Prismatic (2/m) <br/><small>(same [H-M symbol](/source/H-M_symbol))</small>
| symmetry = ''P''2<sub>1</sub>/c
| unit cell = 
| color = colorless
| habit = 
| twinning = 
| cleavage = Absent
| fracture = 	Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz)
| tenacity = 
| mohs = 2 - 3 - Gypsum-Calcite
| luster = 
| refractive = 	n<sub>α</sub> = 1.442 n<sub>γ</sub> = 1.504
| opticalprop = Biaxial (−)
| birefringence = δ = 0.062
| pleochroism = 
| 2V = 
| dispersion = None
| streak = White
| gravity = 
| density = 1.82 - 1.87, Average = 1.84 
| melt = 
| fusibility = 
| diagnostic = 
| solubility = 
| diaphaneity = 
| other = 
| references = <ref name=Mindat>[http://www.mindat.org/min-27.html Mindat.org]</ref><ref name=HB>[http://rruff.geo.arizona.edu/doclib/hom/admontite.pdf Handbook of Mineralogy]</ref><ref name=Webmin>[http://www.webmineral.com/data/Admontite.shtml Webmineral data]</ref>
}}

'''Admontite''' is a hydrated [magnesium](/source/magnesium) [borate mineral](/source/borate_mineral) with formula MgB<sub>6</sub>O<sub>10</sub>·7H<sub>2</sub>O.  

Occurrence -  In a gypsum deposit.
Associations: [gypsum](/source/gypsum), [anhydrite](/source/anhydrite), [hexahydrite](/source/hexahydrite), [löweite](/source/l%C3%B6weite), [eugsterite](/source/eugsterite), [pyrite](/source/pyrite), [quartz](/source/quartz).

It is named after [Admont](/source/Admont), [Austria](/source/Austria).  Its [Mohs scale](/source/Mohs_scale_of_mineral_hardness) rating is 2 to 3.

==See also==
* [List of minerals](/source/List_of_minerals)

==References==
{{Wiktionary}}
{{Reflist}}

Category:Magnesium minerals
Category:Nesoborates
Category:Monoclinic minerals
Category:Minerals in space group 14

{{mineral-stub}}

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