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A Multi-Line Standardless Method for X-Ray Powder Diffraction Phase Analysis

Published online by Cambridge University Press:  06 March 2019

D.Y. Li  and
B.H. O'Connor
D.Y. Li
Affiliation:
Department of Applied Physics Curtin University of Technology Perth, WA, Australia
B.H. O'Connor
Affiliation:
Department of Applied Physics Curtin University of Technology Perth, WA, Australia
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Abstract

Quantitative phase analysis (QPA) methods which employ only one diffraction line for each phase arc generally unreliable due to the influence of systematic errors such as preferred orientation and extinction. Gazzara and Messier (1977) proposed a multi-line QPA method using normalised line intensities for line j of phase i,

where Iij = measured Bragg intensity, m = multiplicity, Lp = Lorentz-polarisation factor, |F| = structure amplitude and Vi = cell volume. The method proposed here is a refinement of the Gazzara-Messier procedure. Phase compositions are calculated directly from the mean normalised Intensity for resolved lines which span the 2θ range of the instrument. The method makes use of the variance in to estimate standard deviations for the phase compositions. Test results are given for binaries of corundum-quartz and corundum-ceria.

Type
II. Quantitative Phase Analysis by X-Ray Diffraction (XRD)
Information
Advances in X-Ray Analysis , Volume 35 , Issue A: First Pacific-International Congress on X-ray Analytical Methods (PICXAM). Fortieth Annual Conference on Applications of X-ray Analysis, August 7-16, 1991 , 1991 , pp. 105 - 110
Copyright
Copyright © International Centre for Diffraction Data 1991

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References

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