Henry, Do you have the correct polarization correction (POLA=0.95, IPOL=0) fro synchrotron radiation? Did you just use the defaults for Uiso (=0.025)? If so that is too high for something like HfO2 for which UISO might be closer to 0.004. Either of these would do what you observe. Bob Von Dreele
-----Original Message----- From: Henry Hsu [mailto:[EMAIL PROTECTED] Sent: Fri 3/12/2004 1:43 AM To: [EMAIL PROTECTED] Dear All, I've been processing a synchrotron XRD pattern of HfO2 using GSAS, but I have not got satisfactory fits to the intensities. At low angles, my calculated peaks are always higher than the observed peaks, whereas the opposite is true for the high angle peaks. I used a capillary sample, and I fixed the absorption coefficient to the value calculated from the sample packing density. Any suggestions? Thanks. Harry _________________________________________________________________ Store more e-mails with MSN Hotmail Extra Storage - 4 plans to choose from! http://click.atdmt.com/AVE/go/onm00200362ave/direct/01/
