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Multiphase Quantitative Analysis of Colorado Oil Shales Involving Overlap of the Diffraction Peaks

Published online by Cambridge University Press:  06 March 2019

D. K. Smith ,
S. M. Sterner ,
D. M. Kerrick  and
W. S. Meddaugh
D. K. Smith
Affiliation:
Department of Geosciences, The Pennsylvania State University, University Park, PA 16802
S. M. Sterner
Affiliation:
Department of Geosciences, The Pennsylvania State University, University Park, PA 16802
D. M. Kerrick
Affiliation:
Department of Geosciences, The Pennsylvania State University, University Park, PA 16802
W. S. Meddaugh
Affiliation:
Gulf Research and Development, Pittsburgh, PA 15230
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Abstract

The method of intensity ratios can be used for quantitative x-ray diffraction analysis even when none of the diffraction peaks of any phase can be individually resolved. The method uses intensity values from a finite number of discrete integration intervals and appropriate reference-intensity-ratios measured on a set of reference samples to yield a best fit composite pattern that is matched to the unknown by least-squares refinement. Solid-solution phases are analyzed by using multiple reference patterns and determining the best choice during the pattern matching procedure. The method may be extended easily to employ whole diffraction traces by using a large number of small intervals.

Type
IV. Quantitative Phase Analysis by XRD
Information
Advances in X-Ray Analysis , Volume 27: Thirty-Second Annual Conference on Applications of X-ray Analysis, August 1-5, 1983 , 1983 , pp. 355 - 362
Copyright
Copyright © International Centre for Diffraction Data 1983

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