Dear Prof. Lutterotti, I was also aware of the fact that GSAS is not made for Size Strain analysis. I got interested to use the Size strain refinement feature of GSAS only after going through the article : "Size-strain line broadening analysis of the ceria round-robin sample" by Prof. D. Balzar et. al. Journal of Applied Crys. 37(2004)911-924.
In that round robin results they have reported the size strain obtained from GSAS. I my case also when I am trying with GSAS, the diffraction pattern is fitting well except the peak braodening. I think this brodening is due to small domain size effect. I that case how will I obatin a good fit with GSAS. Thanking you. Best Regards, Apu /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ Apu Sarkar Research Fellow Variable Energy Cyclotron Centre Kolkata 700 064 phone: 91-33-2337-1230 (extn. 3190) Fax: 91-33-2334-6871 INDIA /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ ----- Original Message ----- From: Luca Lutterotti <[EMAIL PROTECTED]> Date: Friday, March 25, 2005 3:31 pm > Dear Apu, > > I know I will start up a "good" debate here, but size-strain > analysis > with GSAS is a non-sense. The program was not written with that > purpose > in mind and in fact it does not contains the instrumental > aberration > part of the broadening that is necessary for such computation. > Indeed it is possible to get at end some size-strain data, but > quite > hard as you have to do all correction later and out of the > program. So > it is like using GSAS for peak fitting, so better to use a peak > fitting > dedicated program. > > Best wishes, > Luca Lutterotti > > On Mar 25, 2005, at 7:15, [EMAIL PROTECTED] wrote: > > > Dear All, > > I am trying to perform Rietveld refinement on a very simple > system > > using GSAS. I have obtained a reasonable fit except the peak widths. > > > > I want to use the size and strain refinement option in GSAS to > make > > the fit well. > > > > Please tell me how to use the SIZE STRAIN refinement option in GSAS. > > > > P.S. I am using the EXPGUI. > > > > > > Thanks in advace. > > > > Regards, > > > > Apu > > > > > > /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ > > Apu Sarkar > > Research Fellow > > Variable Energy Cyclotron Centre > > Kolkata 700 064 > > phone: 91-33-2337-1230 (extn. 3190) > > Fax: 91-33-2334-6871 > > INDIA > > /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ > > >
