{{short description|Uranyl oxide mineral}} {{infobox mineral | name = Umohoite | category = Oxide and Hydroxide | boxwidth = | image = Umohoite1.jpg | imagesize = 260px | alt = | caption = | formula = (UO<sub>2</sub>)MoO<sub>4</sub>·2H<sub>2</sub>O | IMAsymbol = Umo<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 = | dana = | symmetry = | unit cell = | molweight = | color = Black, blue-black, dark green, orange-red <ref>F. Dal Bo, F. Hatert, S. Philippo (2018). "[https://www.mdpi.com/2075-163X/8/9/414 Supergene Uranyl Mineralization of the Rabejac Deposit, Lodève, France.]" Minerals, Volume 8, Issue 9.</ref> | colour = | habit = | system = Triclinic | twinning = | cleavage = Perfect on {001} | fracture = | tenacity = | mohs = 2 | luster = Vitreous | streak = Blue gray | diaphaneity = Opaque | gravity = | density = 4.53 - 4.66 g/cm3 (Measured) 4.49(3) g/cm3 (Calculated) | polish = | opticalprop = | refractive = nα = 1.660 nβ = 1.831 nγ = 1.915 | birefringence = | pleochroism = | 2V = Measured: 65°, Calculated: 64° | dispersion = | extinction = | length fast/slow = | fluorescence= | absorption = | melt = | fusibility = | diagnostic = | solubility = | other = 25px Radioactive | alteration = | references = }} '''Umohoite''' is a rare oxide and hydroxide mineral. The name of this mineral reflects its composition: uranyl (U), molybdate (Mo) and water ({{H2O-nl}}). Its chemical formula is (UO<sub>2</sub>)MoO<sub>4</sub>·2H<sub>2</sub>O.<ref name=Mindat>{{cite web|url=https://www.mindat.org/min-4093.html|website=mindat.org|title=Umohoite: Umohoite mineral information and data.|access-date=2019-08-14}}</ref>
Umohoite's type location is in Marysvale, the mineral was first described by Paul F. Kerr and G. P. Brophy in 1953.<ref>Brophy, G.P. & Kerr, P.F. (1953): [http://rruff.info/rruff_1.0/uploads/RME-3046_1953_45-51.pdf Hydrous uranium molybdate in Marysvale ore]. Annual Report June 30, 1952 - April 1, 1953 U.S.Atomic Energy Comm., RME-3046, 45-51.</ref>
==References== {{Reflist}}
Category:Uranium minerals