Skip to main content Accessibility help
×
Home

Influence of Goniometric Arrangement and Absorption in Qualitative and Quantitative Analysis of Powders by X-Ray Diffractometry

  • J. Leroux (a1) and M. Mahmud (a1)

Abstract

A theoretical approach of some factors influencing the intensity diffracted by a polycrystalline material at a definite Bragg angle has been confirmed by experimental data obtained with a high-angle Norelco diffractometer. The factors mainly considered are the focusing arrangement of the goniometer which delineates the geometric shape of the volume fraction of the sample being irradiated and the absorption of the latter.

Tests have been performed (a) with quartz mixed in samples covering a large range of absorption coefficients, (b) with two different K radiations using copper and molybdenum targets, (c) with three different angles of beam divergence of 1, ½, and ¼°, respectively, and (d) with the sample packed and leveled in a copper grid with openings of about 350 μ. As this test with copper grids was to demonstrate that each opening was acting like a volume of sample irradiated by a beam of extremely small divergence (0.1°), it also shows that more accuracy in the measurement of the exact Bragg angle can be reached in these conditions as compared to that obtained with conventional sample holders.

A general equation, suitable for qualitative and quantitative analysis when these factors have to be taken into consideration, is proposed.

Copyright

References

Hide All
1 Alexander, L. and Klug, H. P., Anal. Chem., Vol. 20, 1948, p. 886.
2 Leroux, J., Lennox, D. H., and Kay, K., Anal. Chem., Vol. 25, 1953, p. 740.
3 Leroux, J., Norelco Reporter, Vol. IX, No. 5, Sept.-Oct., 1957.
4 Peiser, H. S., Rooksby, H. P., and Wilson, A. J. C., Technical Editors, X-Ray Diffraction by Polycrystalline Materials, Institute of Physics, London, 1955.
5 Klug, H. P. and Alexander, L., X-Ray Diffraction Procedures, John Wiley and Sons, 1954.

Influence of Goniometric Arrangement and Absorption in Qualitative and Quantitative Analysis of Powders by X-Ray Diffractometry

  • J. Leroux (a1) and M. Mahmud (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed