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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Dear All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I want to get correct values of Particle Size and Strain by Rietveld Refinement in GSAS2. I will briefly summarize what I have done so far. I obtained the exact instrument parameter from HRPD beam line and used it. Instrument parameter file was supposed to be used in Fullprof and has the following text:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>“Myresolution function<o:p></o:p></p><p class=MsoNormal> 0.000030 0.000050 0.000110 0 0 0”<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In order to use it in GSAS2 instrument parameter file, I multiplied first three term by 1803.4 and used as U V W and inserted 0 in X and Y of GSAS2 instrument parameters.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>During the refinement I did not refine the “Instrument Parameters” and tried to match the peak shape by refining the “Crystal Size” and “Microstrain” only, under Profile/Data tab. Refinement process proceeds but I am unable to match the experimental peak profile with the calculated one to a good extent. I have following queries and will be thankful if somebody answer it.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>1-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>In old GSAS there were couple of Peak profile function like “Pseudo Voith” and may be Pearson VII also. How can I select/refine these peak Profile functions in GSAS2?<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>2-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Is it correct to fix U,V,W, X,Y in GSAS2 in-order to calculate “Crystal Size” and “Microstrain”?<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>3-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Can I refine “Crystal Size” and “Microstrain” together?<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>4-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>What does it mean by LGmin check box in Profile/Data tab?<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>5-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>How to export the strain data to plot the image? I selected Mustrain plot type, I can see the preview in plot window but can’t export data. If Mustrain is selected and I run the refinement, GSAS2 quits and I can’t open this file again. It always say “Python stopped working”.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>/Shoaib<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> <o:p></o:p></p></div></body></html>