It's German... "verboten" == forbidden. You should never delete the background from a diffraction pattern prior to (Rietveld) analysis.
It changes peak positions and shapes and generally is bad. Cheers Matthew ________________ Matthew Rowles CSIRO Minerals Box 312 Clayton South, Victoria AUSTRALIA 3169 Ph: +61 3 9545 8892 Fax: +61 3 9562 8919 (site) Email: matthew.row...@csiro.au -----Original Message----- From: Olga Smirnova [mailto:olga.smirn...@hw7.ecs.kyoto-u.ac.jp] Sent: Wednesday, 4 March 2009 16:30 To: Brian O'Connor Cc: rietveld_l@ill.fr Subject: Re: cRs According to my computer, I received your response 4 minutes earlier than forwarded the email. What is 'verbotten' (volabulary does not find) ? OS Brian O'Connor wrote: > Background removal is verbotten! > Brian O'Connor > > ________________________________ > > From: Olga Smirnova [mailto:olga.smirn...@hw7.ecs.kyoto-u.ac.jp] > Sent: Wed 4/03/2009 2:14 PM > To: rietveld_l@ill.fr > Subject: cRs > > > > Dear All, > > How is life with conventional R factors when you always have to divide > by zero background? > Let's have time. Considering a part of the profile without peaks one > gets 100% cR. > I did not give the agreement factor; I would say those cR with all > non-excluded points is incorrect, but cR for > points with Bragg contribution is almost the same! > Do you decrease the Rs by adding the background or do you increase cRs > by subtracting the background? > > OS > > PS I did not ask my supervisor before sending such a mail. > > > > > > ------------------------------------------------------------------------ > > Internal Virus Database is out-of-date. > Checked by AVG. > Version: 7.5.519 / Virus Database: 269.21.6/1323 - Release Date: 3/10/2008 > 11:07 AM >
