Mineralogy Database

Downeyite Mineral Data

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General Downeyite Information

Help on Chemical  Formula: Chemical Formula: SeO2
Help on Composition: Composition: Molecular Weight = 110.96 gm
   Selenium  71.16 %  Se  100.00 % SeO2
   Oxygen    28.84 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SeO2
Help on Environment: Environment: Sublimation product of gases escaping through vents in actively burning culm banks in anthracite coal deposits; forms at about 200 deg C near the vents.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Glen Lyon, Luzerne Co.,Pennsylvania, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wayne F. Downey, Jr., of Harrisburg, Pennsylvania, USA, who first collected the mineral.
Help on Name Pronunciation: Name Pronunciation: Downeyite + Pronunciation Say DOWNEYITE
Help on Synonym: Synonym: ICSD 72366
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