[Ifeffit] Problems with Reference Paths
Norbert Weiher
weiher at tech.chem.ethz.ch
Fri Jul 11 06:30:14 CDT 2003
Cheers friends,
now a short question concerning reference paths calculated by FEFF (I use
FEFF8.1):
I have a series of spectra of catalysts containing V,P and O. Data was taken
at the V K edge. I know from literature, that the first coordination shell
should contain some 5-6 O atoms. The problem (and this is really the first
time I ever had problems with this) is that ifeffit (V 1.2.1) is not capable
of fitting even the first shell. As it works fine for model systems, e.g. Au
foil, I wonder if I have problems with the calculation of the references...
As first try, I re-calculated the feffxxxx.dat files with the SCF flag turned
on (which I never used before for the EXAFS) - the problem persisted. Has one
of you experienced similar problems and knows how to come over?
Norbert
--
Dr. rer. nat. Norbert Weiher (norbertweiher at yahoo.de)
Laboratory for Technical Chemistry - ETH Hönggerberg
HCI E 117 - 8093 Zürich - Phone: +41 1 63 3 48 32
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