Re: Reflection rejection

1999-03-24 Thread Peter Y. Zavalij
Yes, it was and still is common to remove some reflections from single crystal data because of various more or less reasonable reasons but I never heard somebody applying it to powder especially Rietveld data... It makes no sense at all... Dr. Peter Y. Zavalij University Crystallographer Mat

Re: Reflection rejection

1999-03-24 Thread Brian H. Toby
It is not possible to exclude a single reflection in Rietveld since one minimizes against the observed pattern not an Fobs table. It is possible to exclude a region containing one or more peaks from the pattern, but you would have to specify each region manually. Also, in the Rietveld method, sigm

Reflection rejection

1999-03-24 Thread Colin Lobban
Are there any Rietveld programs with the capabilty to reject reflections for which (Fobs - Fcal)/sigma(Fobs) is greater than a pre-stated value? I can't find any such feature in GSAS nor Fullprof. Thanks in advance, Colin Lobban.