Umohoite is a rare oxide and hydroxide mineral. The name of this mineral reflects its composition:

uranyl The uranyl ion with the chemical formula has a linear structure with short U–O bonds, indicative of the presence of multiple bonds between uranium and oxygen, with uranium in the oxidation state +6. Four or more ligands may be bound to the u ...

(U), molybdate (Mo) and water (). Its chemical formula is (UO₂)MoO₄·2H₂O. Umohoite's type location is in

Marysvale Marysvale is a town in Piute County, Utah, United States. The population was 356 at the 2020 census. Marysvale is a trail head for the Paiute ATV Trail. History A post office called Marysvale has been in operation since 1872. The town's na ...

, the mineral was first described by Paul F. Kerr and G. P. Brophy in 1953.Brophy, G.P. & Kerr, P.F. (1953)
Hydrous uranium molybdate in Marysvale ore
Annual Report June 30, 1952 - April 1, 1953 U.S.Atomic Energy Comm., RME-3046, 45-51.

References

{{Reflist Uranium minerals