{{Infobox mineral | name = Inyoite | category = Nesoborates | boxwidth = | boxbgcolor = | image = Inyoite-Meyerhofferite-146744.jpg | imagesize = 260px | caption = | formula = CaB<sub>3</sub>O<sub>3</sub>(OH)<sub>5</sub>·4H<sub>2</sub>O | IMAsymbol = Iyo<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.CA.35 | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P2''<sub>1</sub>/a | unit cell = a = 10.63, b = 12.06 <br/>c = 8.4&nbsp;[Å]; β = 114.03°; Z&nbsp;=&nbsp;4 | colour = Colourless, white on dehydration. | habit = Commonly as prismatic to tabular crystals; also in cockscomb aggregates of pseudorhombohedral crystals; coarsely spherulitic or granular | twinning = | cleavage = Good on {001}, distinct on {010} | fracture = Irregular/uneven | tenacity = Brittle | mohs = 2 | lustre = Vitreous | polish = | refractive = n<sub>α</sub> = 1.495 n<sub>β</sub> = 1.505 – 1.512 n<sub>γ</sub> = 1.520 | opticalprop = Biaxial (−) | birefringence = Maximum δ = 0.025 | dispersion = Weak | pleochroism = | fluorescence= | absorption = | streak = | gravity = 1.875 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = | references = <ref name=Mindat>[http://www.mindat.org/min-2036.html Mindat.org]</ref><ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/inyoite.pdf Handbook of Mineralogy]</ref> }}

'''Inyoite''', named after Inyo County, California, where it was discovered in 1914, is a colourless monoclinic mineral. It turns white on dehydration. Its chemical formula is Ca(H{{sub|4}}B{{sub|3}}O{{sub|7}})(OH)·4H{{sub|2}}O or CaB<sub>3</sub>O<sub>3</sub>(OH)<sub>5</sub>·4H<sub>2</sub>O.<ref name=HBM/> Associated minerals include priceite, meyerhofferite, colemanite, hydroboracite, ulexite and gypsum.<ref name=Mindat/><ref name=HBM/>

==References== {{Reflist}}

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Category:Calcium minerals Category:Nesoborates Category:Hydroxide minerals Category:Tetrahydrate minerals Category:Monoclinic minerals Category:Minerals in space group 14 Category:Minerals described in 1914 Category:Luminescent minerals

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