Just a quick question. For Zihao' sample, the 1st peak for Pt-O from PtO2
is at 2.07 A and the 2nd peak for Pt-Pt or Pt-Fe from Pt3-Fe is at 2.736 A.
If these peaks are at different positions, could we use the molar ratio
method to distinguish the contribution from each reference?
My understanding
Extending what Scott said, I find it useful to make the coefficients
abs(fracoxide) and abs(1-abs(fracoxide)) to avoid false minima with
negative S0^2.
mam
On 9/4/2021 1:21 PM, Scott Calvin wrote:
Hi Zihao,
Do it by folding the molar ratio in to the amp parameter for each CIF. Of
cou
Hi Zihao,
Do it by folding the molar ratio in to the amp parameter for each CIF. Of
course S02 is part of that parameter, too.
So the amp for PtO2 might be parameterized as S02 * fracoxide and the amp for
Pt3Fe as S02 * (1-fracoxide)
You could either assume the S02 is the same for the two phas
Dear Ifeffit members:
I have a sample which is a mixture of PtFe and PtO2. In order to do the
EXAFS fitting, I imported 2 CIF files on Artemis and generated the
following 3 paths:
>From PtO2: Pt-O @ 2.07 nm
>From Pt3Fe: Pt-Pt @ 2.736 nm, Pt-Fe @ 2.736 nm
Then, I used these 3 bonds to do the fittin
