I'm not sure exactly what your description of your setup means - do you have a single or twin mirror system? I'm hoping that it's single because your background is way too high for a properly aligned twin mirror system. I'm assuming that you're using GSAS given the data format.
Your pattern refines perfectly adequately with a pseudo-Voigt as long as you deal with the axial divergence (which is quite noticeable). It's not what I normally use, but the Finger-Cox-Jephcoat correction does a good job in this case, which should be profile function 3 in GSAS (unless it's changed recently). BTW, watch what LP correction you use, mirrors are not the same as monochromators, even with a secondary mirror the correct value is 0 degrees. Pam Dr Pamela Whitfield CChem MRSC Energy Materials Institute for Chemical Process and Environmental Technology Building M12 National Research Council Canada 1200 Montreal Road Ottawa ON K1A 0R6 CANADA Tel: (613) 998 8462 Fax: (613) 991 2384 Email: <mailto:[EMAIL PROTECTED]> ICPET WWW: http://icpet-itpce.nrc-cnrc.gc.ca -----Original Message----- From: ruggeri [mailto:[EMAIL PROTECTED] Sent: June 29, 2006 10:45 AM To: rietveld_l@ill.fr Hello all, Has anybody tried to perform Rietveld analysis on LaB6 with twin copper source in /2 / configuration (Goebel mirror)? If yes, can anybody help me on fitting this standard LAB6 (profile function, tips...). Regards. Stéphane Ruggeri, Ph.D. Stagiaire post-doctoral INRS Énergie, Matériaux et Télécommunications 1650, boul. Lionel-Boulet Varennes (Québec) J3X 1S2 Téléphone/Office : (450) 929 8139 Télécopieur/Fax : (450) 929-8198
