Why does a Williamson-Hall analysis of textured ZnO films give a negative value of the grain size (CSD)?

11 April 2013 1 6K Report

In the XRD pattern only (002) and (004) ZnO peaks are presented. Why are the values for integral breadth of (004) reflex overestimated?

Diego Martinez-Martinez

Can you provide some more details about the measurement (Bragg-Brentano, grazing angle, peak shape) and the sample (film, coating, bulk, powder)?

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