WVGES Trace Elements in West Virginia Coals

Click Here To Go To Trace Elements Framed Home Page PRASEODYMIUM (Pr)

Praseodymium Stratigraphic DistributionPraseodymium Geographic DistributionPraseodymium Summary Statistics

Praseodymium is one of the rare-earth-elements (REE) present in West Virginia coals in minor amounts with no geographic or stratigraphic distribution trends and no environmental impact.

Geologic Occurrence: Praseodymium is a trace element in the mineral monazite1.  Monazite was found in trace amounts in 22 of 24 coal samples examined using scanning electron microscopy (SEM) in an unpublished study by the WVGES, but Pr was not detected in any of these grains. Praseodymium was detected in only 80 of 546 coal samples analyzed in West Virginia and averaged 3.11 ppm on a whole coal basis.  Praseodymium correlated poorly with ash yield and slightly with molybdenum and uranium.  Based on only 80 samples, there may be a stratigraphic trend with high Pr in Pocahontas and New River Formation coals, low Pr values in Kanawha Formation coals, and high Pr in Monongahela Group (Pittsburgh and Redstone) coals.

Economic Impact: Praseodymium in coal has no economic impact.  Praseodymium is used in manufacture of cigarette lighters and as a core material in carbon arcs used in motion picture projectors 1.

Environmental Impact: Praseodymium in coal apparently has no environmental impact .

    1. CRC Handbook of Chemistry and Physics
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