Yes, that is of course a more precise and correct answer. I did not mean to imply that diffraction physics work differently, just that the data processing resulted in some badly wrong assumptions about the data being used for Rietveld refinement.
I tried to give a quick answer to a basic question from a basic point of view. If it was an expert question, I would have left it to the experts like you :-) -Peter From: Luca Lutterotti [mailto:[email protected]] Sent: Wednesday, June 24, 2015 3:52 AM To: Khalifah, Peter Cc: [email protected] Subject: Re: TOPAS Macro Language (peak shape broadening macros) On 23 Jun 2015, at 22:22, Khalifah, Peter <[email protected]<mailto:[email protected]>> wrote: Preferred orientation results in the central assumption that the measured intensity is proportional to the reflection structure being violated, This is actually quite new to me as definition of preferred orientation or better texture. Until now I thought that in the case of preferred orientations the measured intensity is proportional to the volume fraction of grains oriented in a certain direction……. As many people will tell you, it is much more effective to eliminate preferred orientation (though improved sample preparation) than to try to model it. We actually use preferred orientation (texture) to help structure solution, and I found more easy to model them than to eliminate them. But may be is just me. Best regards, Luca Lutterotti -----------------------Luca Lutterotti-------------------------------------------- Dipartimento di Ingegneria Industriale, Universita' di Trento, via Sommarive 9, 38123 Trento, Italy Temporary address: Laboratoire CRISMAT-ENSICAEN, Université de Caen Basse-Normandie, Campus 2 6, Bd. M. Juin 14050 Caen, France e-mail address : [email protected]<mailto:[email protected]> Home page : http://www5.unitn.it/People/en/Web/Persona/PER0004735 New Maud page : http://maud.radiographema.com Phone number :+39-0461-28-2414 Fax : +39-0461-28-1977------------------------------------------------------
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <[email protected]> Send commands to <[email protected]> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/[email protected]/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
