Re: [Ifeffit] CN and bond distances in Artemis
Did you check your data against someone else's? Maybe you have hole effect or overabsorption. mam - Original Message - From: "Scott Calvin" <[EMAIL PROTECTED]> To: "XAFS Analysis using Ifeffit" Sent: Monday, December 04, 2006 11:42 AM Subject: Re: [Ifeffit] CN and bond distances in Artemis > Hi Juan, > > You're saying you have that low a value of S02 > for a bulk platinum standard? Anatoly's > right...you'd better figure out why before you > continue. But one piece of advice I have: for a > simple crystalline standard like platinum, by all > means fit more than one coordination shell (with > coordination numbers constrained)! That will be > very helpful in diagnosing what is going on, and, > for certain cases, might even solve the problem. > > Which brings up the first important question to > ask...what is the uncertainty on the S02 of 0.53? > > --Scott Calvin > Sarah Lawrence College > > At 02:03 PM 12/4/2006, you wrote: > > >Hi all, > > > >I read your papers Anatoly. You fixed the value of S02 found in the Pt > >metal, and the expression in Artemis would be like this: N:1 x S02: > >amp·N, right?? > >I have a low value of S02 in the case of platinum (0.53), how can I > >solve the problem? > >Bond distances = delR + Reff (with phase correction)? > > > ___ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
Re: [Ifeffit] CN and bond distances in Artemis
Hi Juan, You're saying you have that low a value of S02 for a bulk platinum standard? Anatoly's right...you'd better figure out why before you continue. But one piece of advice I have: for a simple crystalline standard like platinum, by all means fit more than one coordination shell (with coordination numbers constrained)! That will be very helpful in diagnosing what is going on, and, for certain cases, might even solve the problem. Which brings up the first important question to ask...what is the uncertainty on the S02 of 0.53? --Scott Calvin Sarah Lawrence College At 02:03 PM 12/4/2006, you wrote: Hi all, I read your papers Anatoly. You fixed the value of S02 found in the Pt metal, and the expression in Artemis would be like this: N:1 x S02: amp·N, right?? I have a low value of S02 in the case of platinum (0.53), how can I solve the problem? Bond distances = delR + Reff (with phase correction)? ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
RE: [Ifeffit] CN and bond distances in Artemis
If you mean that your S02 value for platinum foil is 0.53 instead of the expected 0.85 or so, you have to first find out why that happened. There are too many (for a quick list) setup-related and sample-related reasons that can explain why it happened. You should be careful with your NP data analysis, since your foil EXAFS acts up. Anatoly -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Juan Antonio Maciá Agulló Sent: Monday, December 04, 2006 2:03 PM To: XAFS Analysis using Ifeffit Subject: [Ifeffit] CN and bond distances in Artemis Hi all, I read your papers Anatoly. You fixed the value of S02 found in the Pt metal, and the expression in Artemis would be like this: N:1 x S02: amp·N, right?? I have a low value of S02 in the case of platinum (0.53), how can I solve the problem? Bond distances = delR + Reff (with phase correction)? Thank you very much, Best regards, JA ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
[Ifeffit] CN and bond distances in Artemis
Hi all, I read your papers Anatoly. You fixed the value of S02 found in the Pt metal, and the expression in Artemis would be like this: N:1 x S02: amp·N, right?? I have a low value of S02 in the case of platinum (0.53), how can I solve the problem? Bond distances = delR + Reff (with phase correction)? Thank you very much, Best regards, JA begin:vcard n:Maciá Agulló;Juan Antonio tel;fax:0034-965903454 tel;work:0034-965909350 x-mozilla-html:FALSE org:University of Alicante;Department of Inorganic Chemistry adr:;; version:2.1 email;internet:[EMAIL PROTECTED] title:Ph. D. Student fn:Juan Antonio Maciá Agulló end:vcard ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
