Dear Rietvelders, Despite the heated discussion of the problem, the initial question, which, actually, concerned the size distribution from Rietveld refinement, seems to be unsettled. Can we derive ANY information on the crystallite size distribution (based on sensible assumptions) from the Thompson-Cox-Hastings size-broadening parameters P and X normally obtained from Rietveld refinement? For the Ceria Size-Strain Round Robin sample the crystallite distribution dispersion was determined from the profile analysis assuming lognormal distribution. This suggests that the diffraction data contained this information. Why Rietveld refinement can not be used for this purpose? I realize that most simple questions may be most difficult to answer, but nevertheless...
Regards, Leonid __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
