[Ifeffit] EXAFS above 5 angstroms

Christopher Patridge patridge at buffalo.edu
Mon May 21 18:28:58 CDT 2018


Daniel,

Those distances are really far away and I think it would really difficult to see in EXAFS even with pretty high quality data.  Is there are other information from diffraction that suggests these distances?  

Chris
**********************************************
Dr Christopher Patridge
Assistant Professor
Department of Chemistry
SASE 315
D’Youville College
320 Porter Ave.
Buffalo, NY 14201
716-829-8096 / 315-529-0501
patridgc at dyc.edu



> On May 21, 2018, at 7:13 PM, Daniel Sneed <sneedd3 at unlv.nevada.edu> wrote:
> 
> Hello,
> 
> This is my first time posting to the mailing list, so please forgive me if I did not do it correctly. 
> 
> I am currently working on EXAFS of tin(IV) oxide, and I have what appears to be high quality data out to 9 angstroms or so, but I am having some issues in fitting the data above 4 angstroms. I am attempting to verify a crystal structure with a= ~6 angstroms, and another structure with a=~9 angstroms. I know that there is some inhibiting physics at such long distances, such as inelastic scattering, and core-hole lifetime issues that can effect the data. My question for the group is, is there any methodical way to deal with these issues, other than incorporating Ei and the higher cumulants? Or is it even possible to get results from such large R?
> 
> Thank you for your time.
> 
> regards,
> 
> Daniel Sneed
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