Nelson, The easiest way to understand this is to insert values for the crystallite size and look at the FWHM it produces. The limit is the resolution of the FWHM measurement on your instrument, often based on step size. You can also determine the minimum FWHM you can differentiate and solve for the maximum crystallite size you can measure.
Cheers, Ed On Tue, Jan 7, 2014 at 10:28 AM, Nelson <le...@ipn.pt> wrote: > Dear Rietvelds > > > > The Scherrer formula is only applicable if the particle size is ~ 200 nm > or less - it makes use of the line width due to the limited distance range > ? > > > > This is true ? Wich paper are recomended to know why ? > > > > Best regards > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Please do NOT attach files to the whole list <alan.he...@neutronoptics.com > > > Send commands to <lists...@ill.fr> eg: HELP as the subject with no body > text > The Rietveld_L list archive is on > http://www.mail-archive.com/rietveld_l@ill.fr/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > -- Edward A. Laitila Engineer/Scientist Michigan Technological University Dept. of MSE Room 628 M&M Building (906) 369-2041
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <alan.he...@neutronoptics.com> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
