The quantitative determination of FeS2 phases in coal by means of57Fe Mössbauer spectroscopy |
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| Authors: | B. J. Evans Hobart M. King John J. Renton A. Stiller |
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| Affiliation: | (1) Department of Chemistry, The University of Michigan, 48109-1055 Ann Arbor, Michigan, U.S.A.;(2) West Virginia Geological and Economic Survey, Post Office Box 879, 26505 Morgantown, West Virginia, U.S.A. |
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| Abstract: | A knowledge of the concentration of pyrite and marcasite in coals can provide important insight into the genesis of coal deposits. Determinations of the relative amounts of pyrite and marcasite by traditional methods of coal analysis are, however, beset with many difficulties. Using57Fe Mössbauer spectroscopy and a mild chemical treatment with hydrofluoric acid, a technique has been devised for the quantitative determination of the relative concentrations of pyrite and marcasite in samples of whole coals or their low-temperature ashes. The sample preparation procedure is comparable to less accurate methods. Good qualitative agreement has been obtained between ore microscopic and Mössbauer spectroscopic techniques for a series of extensively investigated whole coal samples. |
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