Hostname: page-component-8448b6f56d-qsmjn Total loading time: 0 Render date: 2024-04-25T06:34:26.380Z Has data issue: false hasContentIssue false
  • English
  • Français

Mass Absorption Corrected X-Ray Powder Diffractograms. Part 1: Measuring Pyrite in Powdered Coals

Published online by Cambridge University Press:  10 January 2013

David L. Wertz
David L. Wertz
Affiliation:
Department of Chemistry and Center for Coal Product Research, University of Southern Mississippi, Hattiesburg, Mississippi, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

An X-ray analysis method has been developed for the quantitative analysis of pyrite (FeS2) in coals and lignites. Requiring neither the use of external or internal references, the method linearly relates diffraction peak area in the absorption corrected X-ray diffractogram obtained from the finely powdered coal to the pyrite abundance. The [311] diffraction peak of pyrite (FeS2) has been used to develop the analysis protocol. The Argonne premium coals have been used as the experimental subjects. The abundance of pyrite in each coal has been measured from the absorption corrected diffractograms, which has been constructed from the experimentally measured diffraction intensities and the mass absorption coefficient of each coal sample. The accuracy (accessed from the figure-of-merit and the net count uncertainty associated with the 1.63 Å pyrite peak) as well as the lower limit of detection for pyrite in these coals is presented. The role of the mass absorption coefficient in the conversion of the measured intensity to the absorption corrected intensity is discussed.

Type
Research Article
Information
Powder Diffraction , Volume 5 , Issue 1 , March 1990 , pp. 44 - 47
Copyright
Copyright © Cambridge University Press1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alexander, L. E.and Klug, H. P.(1948) Anal. Chem., 20, 886.CrossRefGoogle Scholar
Chung, F. H.(1974) J. Applied Crystallogr., 7, 519; 526.CrossRefGoogle Scholar
Davis, B. L.and Johnson, L. R.(1988) “Adv. X-Ray Anal.”, 30, 333.Google Scholar
Foster, B. A.and Wolfel, E. R.(1988) “Adv. X-Ray Anal.”, 30, 325.Google Scholar
Frevel, L. K.and Roth, W. C.(1982) Anal. Chem., 54, 677.CrossRefGoogle Scholar
Hubbard, C. R.and Snyder, R. L.(1988) Pow. Diff, 3, 74.CrossRefGoogle Scholar
Jenkins, R.and Schreiner, W. N.(1989) Pow. Diff, 4, 74.CrossRefGoogle Scholar
Klug, H. P.and Alexander, L. E.“X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials,” Wiley-Interscience, N. Y., 1974, p. 360.Google Scholar
Kruh, R. F.(1962) Chem. Rev., 62, 319.CrossRefGoogle Scholar
Lange, B. A.and Haartz, J. C.(1979) Anal. Chem., 51, 520.CrossRefGoogle Scholar
Leroux, J., Lennox, D. H.and Kay, K.(1953) Anal. Chem., 25, 740.CrossRefGoogle Scholar
Milberg, M. E.(1959) Rev. Modern Phys., 29, 62.Google Scholar
Nakamura, T., Sameshima, K., Okunaga, K., Sugiura, Y, and Sato, J.(1989) Pow. Diff., 4, 9.CrossRefGoogle Scholar
Smith, D. K., Johnson, G. G., Scheible, A., Wims, A. M., Johnson, J. L., and Ullmann, G.(1987) Pow. Diff., 2, 73.CrossRefGoogle Scholar
Vorres, Karl S., Manager; Premium Coal Sample Program, Argonne National Laboratory.Google Scholar
Wang, H.(1988) Pow. Diff., 3, 165.CrossRefGoogle Scholar
Wertz, D. L., Collins, L. W., and Froelicher, F.(1988) “Adv. X-ray Anal.” 31,343.Google Scholar
Wertz, D. L., Smithhart, C. B., and Wertz, S. L.(1989) “Adv. X-ray Anal.”, accepted for publication.Google Scholar
Williams, P. P.(1958) Anal. Chem., 31, 1842.CrossRefGoogle Scholar
Zevin, L. S.and Zevin, I. M.(1987) Pow. Diff., 2, 78.CrossRefGoogle Scholar