Umohoite is a rare oxide and hydroxide mineral.

The name of this mineral reflects its composition: uranyl (U), molybdate (Mo) and water (H2O).

Its chemical formula is (UO2)MoO4·2H2O.

[3] Umohoite's type location is in Marysvale, the mineral was first described by Paul F. Kerr and G. P. Brophy in 1953.

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