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The Effects of Extinction on X-Ray Powder Diffraction Intensities

Published online by Cambridge University Press:  06 March 2019

Janies P. Cline  and
Robert L. Snyder
Janies P. Cline
Affiliation:
Ceramics Division, National Bureau of Standards, Gaithersburg, MD 20899
Robert L. Snyder
Affiliation:
New York State College of Ceramics, Alfred University, Alfred, NY 14802
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Extract

Several factors have long been known to affect the intensity measurements of X-ray powder diffraction. The characterization of these effects has been impeded by difficulties in their isolation and the statistical nature of the data in which they manifest themselves. The most celebrated, and most detrimental, of the these effects is that of preferred orientation. This error can be eliminated with the spherical agglomeration of the sample (1). The spray drying process offers this result and is considered to have the broadest range of applicability to materials encountered by the powder diffractionist.

Type
VIII. Advances in XRD Instrumentation and Procedures
Information
Advances in X-Ray Analysis , Volume 30: Thirty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-8, 1986 , 1986 , pp. 447 - 456
Copyright
Copyright © International Centre for Diffraction Data 1986

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Footnotes

*

Contribution of the National Bureau of Standards, not subject to copyright in the United States.

References

1. Smith, S.T., Snyder, R.L., and Brownell, W.E., “Minimiaation of Preferred Orientation in Povders by Spray Drying”, Adv. X-ray Anal., 22, pp. 77–88 (1979).Google Scholar
2. Cline, J.P. and Snydet, R.L., “The Dramatic Effect of Crystallite Sise or. X-ray Intensities”, Adv. X-rav Anal. 26. 111 (1983).Google Scholar
3. Cline, J.P., “A Study of Quantitative Analysis by X-ray Powder Diffraction”, Ph.D. Thesis, Alfred University, 1986,Google Scholar
4. Darwin, C.G., Phil. Mag.. 27, 325, 675 (1914).Google Scholar
5. Ewald, P.P., Ann. Phys.. 49, 117, (1916); 54, 519, 557 (1917).Google Scholar
6. Darwin, C.G., Fhil. Mag. 4J. 800 (1922).Google Scholar
7. Zachariasen, W.H., Theory of X-ray Diffraction in Crystals, Dover Publications, Inc., New York, NY. 945.Google Scholar
8. Cline, J.P., Snyder, R.L., “The Dynamics of Microstructure Development on Spray Drying of Agglomerates”, in process.Google Scholar
9. Union Carbide, Coatings Service Department, 1550 Polco Street, Indianapolis, IN. 6224.Google Scholar
10. Aluminum Go. of American, 1501 Alcoa Bldg., Pittsburgh, PA. 15219.Google Scholar
11. Cerac High Temperature Materials, Allis-Chalmers, Milwaukee, WI.Google Scholar
12. Snyder, R.L., Hubbard, C.R., and Panagiotopoulos, M.C., “Auto: A Real Time Diffractometer Control System”, NBSIR. 1-2229.Google Scholar
13. Chung, F.H., “Quantitative Interpretation of X-ray Diffraction Pattems of Mixtures I. Matrix-flushing Method for Quantitative Multicomponent Analysis”, J. Appl. Crvst. 2, pp. 529–525 (1974).Google Scholar
14. Snyder, R.L., Hubbard, C.R., NBS*Quant84, NBS. pecial Publication (in press).Google Scholar
15. Brindley, G.W., “The Effect of Grain or Particle Size on X-ray Reflection from Mixed Powders or Alloys” Phil. Mag., 36. (7) 347 (1945).Google Scholar