[Ifeffit] TiFe EXELFS Two Phase Co-Refinement Question

Christopher Patridge patridge at buffalo.edu
Thu Jun 10 13:59:51 CDT 2021

Hi Catrina,

I believe the weighting would/could be set using either the SO2 or N value.  If the coordination is well known and reliable, you could create a variable x and (1-x) in So2 but of course, it could be more complicated.

There are numerous examples of fitting two phases to a sample with a little googling.

hope that helps,


Dr Christopher Patridge
Associate Professor 
Dept of Chemistry
SASE 315
716-829-8096 | patridgc at dyc.edu
www.dyc.edu <http://www.dyc.edu/>

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> On Jun 10, 2021, at 1:51 PM, Wilson, Catrina <wilson.3981 at buckeyemail.osu.edu> wrote:
> Hello,
> I am using Artemis to fit EXELFS data on a TiFe alloy. There are multiple interfaces between two phases (Im-3m, and P63/mmc) present in the data. I am attempting to co-refine using both phases to create a path list and using paths from both phases in the fit. My understanding of this process is that the software uses a linear combination of each path. However, that would imply that there is a weighting factor applied to each phase that would be correlated to the phase weight for that region. 
> I was wondering if there is a way to determine what the weighting factors during a co-refinement to multiple phases are in Artemis, assuming my initial understanding of the co-refinement process is correct? 
> Thanks for your time,
> Catrina Wilson
> Ph.D. Candidate
> The Ohio State University
> Doan-Nguyen Group and McComb Group Materials Science and Engineering
> Center for Electron Microscopy, 1305 Kinnear Rd., Columbus, OH 43212
> (614) 643-3110 Office
> wilson.3981 at osu.edu <mailto:wilson.3981 at osu.edu> / osu.edu <http://osu.edu/>
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