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TitleStatistical measures of spottiness in diffraction rings
Publication TypeJournal Article
Year of Publication2014
AuthorsIngham, B.
JournalJournal of Applied Crystallography
Pagination166 - 172
Date Published2014
ISSN00218898 (ISSN)
KeywordsCarbon dioxide, Carbon steel, computer simulation, Diffraction rings, Fractal analysis, Fractal dimension, Incident beams, Intensity variations, Root Mean Square, Situ corrosion, Size distribution, Statistical measures, Statistical methods, Synchrotron x ray diffraction, X ray diffraction
AbstractSpotty diffraction rings arise when the size distribution of crystallites illuminated by the incident beam includes crystallites that are large compared with the size of the beam. In this article, several statistical measures are used in conjunction to quantify spottiness and relate it to a crystallite size distribution: the number of peaks, the normalized root mean square intensity variation and the fractal dimension. These are demonstrated by way of example using synchrotron X-ray diffraction patterns collected during in situ corrosion of mild steel in carbon dioxide-saturated aqueous brine. © 2014 International Union of Crystallography.

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