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An Experimental Examination of Error Functions for Bragg-Brentano Powder Diffractometry

Published online by Cambridge University Press:  06 March 2019

H.W. King  and
E.A. Payzant
H.W. King
Affiliation:
Department of Materials Engineering, University of Western Ontario, London, ON, N6A 5B9, Canada
E.A. Payzant
Affiliation:
Department of Materials Engineering, University of Western Ontario, London, ON, N6A 5B9, Canada
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Abstract

A single function for the elimination of errors in precision lattice parameter determination has not been developed for the Bragg-Brentano x-ray diffractometer method, because of the different angular dependencies of the systematic errors. A review of the error functions shows that all but one can be calculated from the instrumental settings and known properties of a sample under investigation. The residual sample displacement error can be then be eliminated by using extrapolation plots or computer methods to correct the data to cosθcotθ plots. The slopes of cosθcotθ plots can also be used to align high temperature furnaces and low temperature cryostats mounted on x-ray diffractometers.

Type
X. XRD Techniques and Instrumentation
Information
Advances in X-Ray Analysis , Volume 36: Forty-First Annual Conference on Applications of X-ray Analysis, August 3-7, 1992 , 1992 , pp. 663 - 670
Copyright
Copyright © International Centre for Diffraction Data 1992

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