Carlos,

you can only have one absorbing atom in a feff calculation.  You must run each atom separately if you want an average structure for the the amorphous material.  24 feff calculations with each Ti as the absorber.  Then average the spectra.  Anyone else have a better method?

hth,

Chris
********************************************
Dr. Christopher Patridge
Assistant Professor of Chemistry
Dept of Math and Natural Science
D'youville College
320 Porter Ave., Buffalo, NY 14201
Phone: 716-829-8096
Email: patridgc@dyc.edu



On Sep 29, 2014, at 11:44 AM, Carlos Triana Estupinan <ctrianae@unal.edu.co> wrote:

Dear
Feff group

I am Carlos Triana, and I want ask you the following.
I am trying to calculate the feff.inp file for a theoretical amorphous structure composed by a supercell with 24 Ti atoms surrounding by 48 oxygen atoms with different coordination. In amorphous materials or materials with distortions from regular crystals, the absorbing atoms may have different surroundings.
My question is how can I build the feff.inp file in this case, shall I define the 24 Ti atoms like absorbing atoms, because in this case the feff does not works. 
What can I do in this case, how can I build the feff.inp file with different environments

I will be very grateful for your help

--

Carlos Augusto Triana Estupiñan (C.A. Triana-E)
Physicist
M.Sc. In Physical Sciences-Research
PhD Student-Research
Ångströmlaboratoriet, Lägerhyddsv. 1
Solid State physics
Uppsala University, Box 534
751 21 Uppsala, Sweden
Tel: +46 018 471 3144
e-mail:carlos.triana@angstrom.uu.se
web:http://www.uu.se/

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