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

uranyl The uranyl ion is an oxycation of uranium in the oxidation state +6, with the chemical formula . It has a linear structure with short U–O bonds, indicative of the presence of multiple bonds between uranium and oxygen. Four or more ligands ...

(U), molybdate (Mo) and water (). Its chemical formula is (UO₂)MoO₄·2H₂O. Umohoide's type location is in Marysvale, the mineral was first described by

Paul F. Kerr Dr. Paul F. Kerr (12 February 1897 – 27 February 1981), was a Professor of Mineralogy at Columbia University. During the second World War, he was tasked with locating and procuring supplies of uranium for the Manhattan Project. Kerr had an a ...

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