Mineralogy Database

Laphamite Mineral Data

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General Laphamite Information

Help on Chemical  Formula: Chemical Formula: As2(Se,S)3
Help on Composition: Composition: Molecular Weight = 351.55 gm
   Arsenic   42.62 %  As
   Selenium  50.54 %  Se
   Sulfur     6.84 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: As2Se2.25S0.75
Help on Environment: Environment: Secondary mineral formed as a sublimation product of a burning anthracite coal mine waste dump fire.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Burnside, Northumberland County, Pennsylvania, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Davis M. Lapham (1931-1974), former Chief Mineralogist of the Pennsylvania Geological Survey.
Help on Name Pronunciation: Name Pronunciation: Laphamite + Pronunciation Say LAPHAMITE
Help on Synonym: Synonym: ICSD 29535
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