Hi Fenglong, You can do the next part of the analysis in Artemis. I have a powerpoint tutorial showing the different parts of Artemis on the xafs.org wiki. http://www.xafs.org/Tutorials It is called Basics_of_XAFS_analysis.pdf It is a bit dated now, but the main points are all the same. I recommend Matt's tutorials on that page. Bruce has documentation for Artemis at http://cars9.uchicago.edu/~ravel/software/docs.html And Matt has a data base of crystal structure input files that are already in the correct format for Artemis at http://cars9.uchicago.edu/~newville/adb/ Artemis comes with several working examples that you can find in the distribution package. These links should get you going. Cheers, Shelly ________________________________________ From: ifeffit-bounces@millenia.cars.aps.anl.gov [mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf Of Fenglong Sun Sent: Monday, November 05, 2007 6:00 PM To: ifeffit@millenia.cars.aps.anl.gov Subject: [Ifeffit] How to generate the input information for Atom Hi, Bruce, I am working on an experiment of arsenic adsorption on pyrite particles. I have the data of mu(E)~E. I use Anthena to do the Fourier transform. Now I want to know the cordination information of arsenic atom. How can I get the input file for Atom if I want to do the fitting job by using Iffefit package? Thanks!