> * I remember that a Fortran version was in tests there (in Rennes in 1975-76), probably one of these 27 copies distributed by Hugo Rietveld himself to institutes all over the world.*
Rietveld worked with neutron powder diffraction on magnetic and heavy metal oxides. An x-ray lab. in Rennes was probably not one of the selected 27 institutes all over the world. As Rietveld wrote in the paper you cited, "*The response was slight, or, rather, non-existent*", and by 1975-76 he had already left science. Probably, that's how legends begin. On Thu, 16 Aug 2018 at 21:05, Le Bail Armel <le-bail.ar...@orange.fr> wrote: > Hi, > > > > Sorry for that blank email... > > Since times are to old stories about the Rietveld method, I first > heard about it in 1975-76 during my "3ème cycle" thesis in D. Grandjean > laboratory, Rennes, France, under the direction of D. Louër. The thesis > was about profile-shapes broadening due to powder small grain size. > http://www.cristal.org/rapport/Le-Bail-These-3eme-Cycle.pdf > > I did not use the Rietveld method at that time but I remember that > a Fortran version was in tests there, probably one of these 27 copies > distributed by Hugo Rietveld himself to institutes all over the world. > http://home.wxs.nl/~rietv025/Rietveld%20Method.docx > > My profile shapes were quite Lorentzian and there was considerable > anisotropic broadening, something not yet accountable by the Rietveld > method at that time focused on Gaussian peak shapes. > > I was not back about the Rietveld method before the XIII IUCr Congress, > 1984, Hamburg, where I proposed a way to undertake such X-ray complex > shapes: "The Rietveld method using an experimental profile convoluted > by adjustable analytical function". This was the ARIT software later > used in 1987 for intensities extraction purposes by iterating the > Rietveld decomposition formula, leading to many SDPDs (Structure > Determination by Powder Diffractometry). > http://cristal.org/mespapiers-PDF/1984/1984-Rietveld-a31186.pdf > http://www.cristal.org/arit.html > > Best, > > > > Armel > > > > PS- Better to write your own story clearly yourself before to leave the > planet, > > even if nobody apparently read it. > > http://www.cristal.org/iniref/lbm-story/ > > > > > > > > > > > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 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/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > -- ______________________________________________ * Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE * <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/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
