Admontite

{{Short description|Borate mineral}} {{Infobox mineral | name = Admontite | category = Nesoborates | boxwidth = | boxbgcolor = | image = Admontite.jpg | caption = | formula = MgB₆O₁₀·7H₂O<ref name=HB/> or <br/>MgB₆O₇(OH)₆·4H₂O<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 | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P''2₁/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_α = 1.442 n_γ = 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 borate mineral with formula MgB₆O₁₀·7H₂O.

Occurrence - In a gypsum deposit. Associations: gypsum, anhydrite, hexahydrite, löweite, eugsterite, pyrite, quartz.

It is named after Admont, Austria. Its Mohs scale rating is 2 to 3.

==See also== * List of minerals

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

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

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