Nosean

{{Short description|Mineral of the feldspathoid group}} {{Infobox mineral | name = Nosean | boxwidth = | boxbgcolor = | image = Nosean crystal group - Ochtendung, Eifel, Germany.jpg | alt = | caption = Nosean crystal group from Ochtendung, Eifel, Germany | category = Tectosilicate minerals | group = Feldspathoid group, sodalite group | formula = {{chem2|Na8(Al6Si6O24)(SO4)*H2O}}<ref name="mindat">{{cite web |title=Feldspathoid |url=https://www.mindat.org/min-47865.html |website=mindat.org |publisher=Hudson Institute of Mineralogy |access-date=23 February 2025}}</ref> | IMAsymbol = Nsn<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 = 9.FB.10 | dana = | system = Cubic | class = Hextetrahedral ({{overline|4}}3m) <br/>H-M symbol: ({{overline|4}} 3m) | symmetry = ''P''{{overline|4}}3m | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}

'''Nosean''', also known as '''noselite''', is a mineral of the feldspathoid group with formula: {{chem2|Na8(Al6Si6O24)(SO4)*H2O}}.<ref name="mindat" /> It forms isometric crystals of variable color: white, grey, blue, green, to brown. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 2.3 to 2.4. It is fluorescent. It is found in low-silica igneous rocks. There is a solid solution between nosean and hauyne, which contains calcium.

It was first described in 1815 from the Rhineland in Germany and named after the German mineralogist K. W. Nose (1753–1835). The mineral is rare but widespread, found in such diverse localities as ocean islands (e.g., Tahiti) and the La Sal Range in Utah.

==References== {{Reflist}} {{commons category|Nosean}}

{{Refbegin}} * [http://webmineral.com/data/Nosean.shtml Webmineral data] * [http://www.mindat.org/min-2936.html Mindat with location data] {{Refend}}

Category:Sodalite group Category:Sodium minerals Category:Aluminium minerals Category:Sulfate minerals Category:Cubic minerals Category:Minerals in space group 215