Hostname: page-component-669899f699-chc8l Total loading time: 0 Render date: 2025-04-26T20:19:10.045Z Has data issue: false hasContentIssue false
  • English
  • Français

X-Ray Mass Absorption Coefficients: Measurements and Uses in the Quantitative Diffraction Analysis of Pyrite in Coals

Published online by Cambridge University Press:  06 March 2019

David L. Wertz ,
Charles B. Smithhart  and
Stacey L. Wertz
David L. Wertz
Affiliation:
Department of Chemistry and Center for Coal Product Research University of Southern Mississippi Hattiesburg, MS 39406-5043 USA
Charles B. Smithhart
Affiliation:
Department of Chemistry and Center for Coal Product Research University of Southern Mississippi Hattiesburg, MS 39406-5043 USA
Stacey L. Wertz
Affiliation:
Department of Chemistry and Center for Coal Product Research University of Southern Mississippi Hattiesburg, MS 39406-5043 USA
Get access

Extract

The mass absorption coefficient (μ) of a weakly absorbing solid material may be measured by either the transmission or the reflection method. The latter typically employs a crystalline substrate and the diffraction method, measuring the transmission of the diffraction peak(s) of the substrate through the analyte. Compressing or compacting a powdered sample is not required when the reflection method is used.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 33: Thirty-Eighth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1989 , 1989 , pp. 475 - 483
Copyright
Copyright © International Centre for Diffraction Data 1989

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.)

Article purchase

Temporarily unavailable

References

1. Support from the U. S. Department of Energy (Grant No. DE-FG97-83WM46655) via the Mississippi Department of Energy and Transportation (Contract No. 88-130-074) is gratefully acknowledged.Google Scholar
2. Williams, P. P., 1958, Anal. Chem., 31: 1842.Google Scholar
3. Leroux, J., Davey, H. B. C., and Paillard, A., 1973, Am. Ind. Hyg. Assoc. J., 34: 409.Google Scholar
4. Lange, B.A. and Haartz, J.C., 1979, Anal. Chem., 51: 520.Google Scholar
5. Frevel, L.K. and Roth, W.C., 1982, Anal. Chem., 54: 677.Google Scholar
6. Davis, B.L. and Johnson, 1988, in “Adv. X-Ray Anal.”, 30: 333.Google Scholar
7. Klug, H.P. end Alexander, L.E., 1974, “X-ray Diffraction Procedures for PolyCrystalline and Amorphous Materials,” Wiley-Interscience, N. Y., p. 360.Google Scholar
8. Samples of the Argonne Premium Coals were provided by Dr. Karl Vorres, Program Manager, Premium Coal Sample Program, Argonne National Laboratory.Google Scholar
9. The absorption coefficient for each of the reagent grade materials was calculated from tabular values by Pcalc = ax·μx; where a is the weight fraction of element x in the compound and μx is its mass absorption coefficient. The elemental mass absorption coefficients were taken from “International Tables of X-Ray Crystallography, Vol. III.” International Union of Crystallography. The Kynoch Press. Birmingham, England, 1962, p. 162.Google Scholar
10. Franklin, R. E., 1950, Acta Crystallogr., 3: 10.Google Scholar
11. Kwan, J. T. and Chen, T. I., 1976, Proc. Div. Fuel Div. (ACS), 21: 67.Google Scholar
12. Davis, B. L., 1986, Powder Diffr., 1: 244.Google Scholar
13. McCarthy, G. J., 1986, Powder Diffr., 1: 50.Google Scholar
14. Wertz, D. L., 1988, Powder Diffr., 3: 153.Google Scholar