Mineralogy Database

Haynesite Mineral Data

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General Haynesite Information

Help on Chemical  Formula: Chemical Formula: (UO2)3(SeO3)2(OH)2•5(H2O)
Help on Composition: Composition: Molecular Weight = 1,188.09 gm
   Uranium   60.10 %  U    68.18 % UO2
   Hydrogen   1.02 %  H     9.10 % H2O
   Selenium  13.29 %  Se   18.68 % SeO2
   Oxygen    25.59 %  O
            ______        ______ 
            100.00 %       95.96 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (UO2)3(SeO3)2(OH)2•5(H2O)
Help on Environment: Environment: Found as crusts on mudstones and sandstones of the Morrison formation.
Help on IMA Status: IMA Status: Approved IMA 1991
Help on Locality: Locality: Repete mine near Blanding, San Juan County, Utah. USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Patrick Haynes, U.S. Geologist who first collected the mineral.
Help on Name Pronunciation: Name Pronunciation: Haynesite + Pronunciation Say HAYNESITE
Help on Synonym: Synonym: IMA1990-024