To follow up on Edmund’s comment, tin has a few different (and pretty distinct) crystalline phases. I think neither “white” nor “grey” tin has a near neighbor distance below 2. 5 Ang. I don’t recall the structure of the other phase. Tin is slightly
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To follow up on Edmund’s comment, tin has a few different (and pretty distinct) crystalline phases. I think neither “white” nor “grey” tin has a near neighbor distance below 2.5 Ang.  I don’t recall the structure of the other phase.

Tin is slightly complicated for a reference material. 


--Matt 

 

 

Dear A, I think you are trying to fit a peak which shouldn't be there. If you call 1. 8 to 3. 5 higher R space I think you are trying to fit an artifact of the FT. You should try and go back to the background subtraction etc. Cheers, Edmund -----

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From: Welter, Edmund via Ifeffit <ifeffit@millenia.cars.aps.anl.gov>
Date: Thursday, February 13, 2025 at 8:51 AM
To: XAFS Analysis using Ifeffit <ifeffit@millenia.cars.aps.anl.gov>
Cc: Welter, Edmund <edmund.welter@desy.de>
Subject: [Ifeffit] Re: Artemis: Rejects first shell fitting

Dear A,
 
I think you are trying to fit a peak which shouldn't be there. If you call 1.8 to 3.5 higher R space I think you are trying to fit an artifact of the FT. You should try and go back to the background subtraction etc. 
 
Cheers,
Edmund
 
 
----- Original Message -----
From: "XAFS Analysis using Ifeffit" <ifeffit@millenia.cars.aps.anl.gov>
To: "XAFS Analysis using Ifeffit" <ifeffit@millenia.cars.aps.anl.gov>
Cc: avijay@ethz.ch
Sent: Thursday, February 13, 2025 3:45:52 PM
Subject: [Ifeffit] Re: Artemis: Rejects first shell fitting
 
Hello!
 
I was trying to fit the Sn foil reference .
 
As a side note, I did check another literature (DOI 10.1149/2.0091412jss) who also fit the data between higher R space: 1.8 and 3.0 (3.5) Å, which I think is similar to my attempt at the fitting where the Sn1.1 and Sn1.2 at lower R were excluded from the fit to get a meaningful value of the parameters of the fit.
 
I appreciate the help!
 
Best,
A
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