Umohoite

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.[2]

Umohoite
General
CategoryOxide and Hydroxide
Formula
(repeating unit)
(UO2)MoO4·2H2O
Crystal systemTriclinic
Identification
ColorBlack, blue-black, dark green, orange-red [1]
CleavagePerfect on {001}
Mohs scale hardness2
LusterVitreous
StreakBlue gray
DiaphaneityOpaque
Density4.53 - 4.66 g/cm3 (Measured) 4.49(3) g/cm3 (Calculated)
Refractive indexnα = 1.660 nβ = 1.831 nγ = 1.915
2V angleMeasured: 65° , Calculated: 64°
Other characteristics Radioactive

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

References

  1. F. Dal Bo, F. Hatert, S. Philippo (2018). "Supergene Uranyl Mineralization of the Rabejac Deposit, Lodève, France." Minerals, Volume 8, Issue 9.
  2. "Umohoite: Umohoite mineral information and data". mindat.org. Retrieved 2019-08-14.
  3. 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.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.