>That is why I prefer to use Rietveld's original term "profile refinement" for >all kinds of powder pattern refinement, and reference Loopstra and Rietveld >(1969) instead of >just Rietveld (1969)
In the Introduction of Loopstra and Rietveld (1969) they referred to the approach as "the profile refinement technique (Rietveld, 1967, 1968)" and give some important expressions for the refinement procedure that were absent in Rietveld (1967). So, a more correct citation for the profile refinement technique would be (Rietveld, 1967, Loopstra & Rietveld, 1969). ******************************************************* Leonid A. Solovyov Institute of Chemistry and Chemical Technology 660036, Akademgorodok 50/24, Krasnoyarsk, Russia http://sites.google.com/site/solovyovleonid ******************************************************* On Wednesday, August 22, 2018, 3:02:48 PM GMT+7, Alan Hewat <alan.he...@neutronoptics.com> wrote: Leonid. Rietveld's code is indeed a specific type of profile refinement. Structure parameters are refined to fit the observed profile intensities using a least squares code similar to that used to fit integrated Bragg intensities at Oak Ridge - ORFLS (1962). From 1961 profile refinement methods were used at Argonne to fit multiple peaks to profile intensities, and later at Petten. All references are given in vL&S. Unfortunately, the term "Rietveld method" has been applied to types of profile refinement that are closer to earlier profile refinement methods, such as refining the proportions of different phases where the individual structures are known. That is why I prefer to use Rietveld's original term "profile refinement" for all kinds of powder pattern refinement, and reference Loopstra and Rietveld (1969) instead of just Rietveld (1969). I would also call quantitative phase analysis from powders "profile refinement" rather than Rietveld refinement, and reference Werner et al. (1979). ______________________________________________________ Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE from my tablet <alan.he...@neutronoptics.com> +33.476.98.41.68 http://www.NeutronOptics.com/hewat ______________________________________________________++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 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/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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