{{Short description|Sulfate mineral}} {{Infobox mineral | name = Blödite | category = Sulfate minerals | image = Blodite-162510.jpg | imagesize = 260px | caption = Doubly terminated blödite crystal from Soda Lake, San Luis Obispo County, California (size: 7.0 × 4.8 × 1.9 cm) | formula = Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O | IMAsymbol=Blö<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 = 7.CC.50 | system = Monoclinic | class = Prismatic (2/m) <br><small>(same H-M symbol)</small> | symmetry = ''P2''<sub>1</sub>/a | unit cell = a = 11.04 Å, b = 8.15 Å, <br/>c = 5.49 Å; β = 100.41°; Z = 2 | color = Colorless, yellow, may be dark gray, bluish green, or reddish due to inclusions | habit = Prismatic to equant crystals, granular, massive | twinning = | cleavage = | fracture = Conchoidal | tenacity = Brittle | mohs = 2.5–3 | luster = Vitreous | refractive = n<sub>α</sub> = 1.483, n<sub>β</sub> = 1.486, n<sub>γ</sub> = 1.487 | opticalprop = Biaxial (−) | birefringence = δ = 0.004 | pleochroism = | 2V = 71° (measured) | streak = | gravity = 2.23 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = | references = <ref name=HBM>[http://rruff.info/doclib/hom/blodite.pdf Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-695.html Blödite on Mindat.org]</ref><ref name=Webmin>[http://webmineral.com/data/Blodite.shtml Blödite data on Webmineral]</ref> }}
'''Blödite''' or '''bloedite''' is a hydrated sodium magnesium sulfate mineral with the formula Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O. The mineral is clear to yellow in color often darkened by inclusions and forms monoclinic crystals.
Blödite was first described in 1821 for an occurrence in a salt deposit in Ischler Salzberg, Bad Ischl, Gmunden, Austria and named for German mineralogist and chemist Karl August Blöde (1773–1820).<ref name=Mindat/><ref name=Webmin/>
It is found worldwide in evaporitic sedimentary environments such as the Great Salt Lake, Utah.
thumb|none|Crystal from Soda Lake (size: 2.9 × 2.2 × 1.4 cm) ==See also== *List of minerals *List of minerals named after people
==References== {{reflist}}
{{commonscat|Blödite}} {{DEFAULTSORT:Blodite}} Category:Sodium minerals Category:Magnesium minerals Category:Sulfate minerals Category:Tetrahydrate minerals Category:Monoclinic minerals Category:Minerals in space group 14 Category:Minerals described in 1821 Category:Evaporite
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