[Ifeffit] EXAFS on multi phase systems

Fri May 6 07:57:41 CDT 2011

Hi Scott, Hi Bruce,

Thanks a lot for directing me to the available literatures. It will be of great help.

With best regards,
Jatin

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Today's Topics:

   1. EXAFS on multi phase systems (Jatinkumar Rana)
   2. Re: EXAFS on multi phase systems (Scott Calvin)
   3. Re: EXAFS on multi phase systems (Bruce Ravel)

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Message: 1
Date: Thu, 05 May 2011 09:26:02 +0200
From: Jatinkumar Rana <jatinkumar.rana at helmholtz-berlin.de>
To: Ifeffit users <ifeffit at millenia.cars.aps.anl.gov>
Subject: [Ifeffit] EXAFS on multi phase systems
Message-ID: <4DC2510A.7030907 at helmholtz-berlin.de>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Dear ifeffit users,

I was wondering if one could apply EXAFS to multi-phase systems (e.g.
two phase systems) where both phases could be crystallographically
different but contain same absorbing atom.

Can anyone suggest any literature which dealt with such a problem ??

With best regards,

Jatinkumar Rana

Helmholtz-Zentrum Berlin f?r Materialien und Energie GmbH
Institut f?r angewandte Materialforschung
FI-1 Mikrostruktur

Hahn-Meitner-Platz 1
D-14109 Berlin Germany
Tel: +49 30 8062-43217
Fax: +49 30 8062-43059
eMail: jatinkumar.rana at helmholtz-berlin.de

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------------------------------

Message: 2
Date: Thu, 5 May 2011 07:46:33 -0700
From: Scott Calvin <dr.scott.calvin at gmail.com>
To: XAFS Analysis using Ifeffit <ifeffit at millenia.cars.aps.anl.gov>
Cc: Scott Calvin <scalvin at slc.edu>
Subject: Re: [Ifeffit] EXAFS on multi phase systems
Message-ID: <43612A83-383E-46DC-8182-4986C8C66FA1 at gmail.edu>
Content-Type: text/plain; charset="windows-1252"; Format="flowed";
        DelSp="yes"

Hi Jatinkumar,

It's fairly common to do so. With linear combination analysis or
principle component analysis, it's necessarily the case. But it's also
done with modelling using FEFF. I personally have published many
papers of this type. One early paper of mine that does this is:

?X-ray absorption spectroscopy of highly-cycled Li/CPE/FeS2 cells,? E.
Strauss, S. Calvin, H. Mehta,* D. Golodnitksy, S. G. Greenbaum, M. L.
denBoer, V. Dusheiko, and E. Peled, Solid State Ionics 164, 51 (2003).

--Scott Calvin
Sarah Lawrence College

On May 5, 2011, at 12:26 AM, Jatinkumar Rana wrote:

> Dear ifeffit users,
>
> I was wondering if one could apply EXAFS to multi-phase systems (e.g.
> two phase systems) where both phases could be crystallographically
> different but contain same absorbing atom.
>
> Can anyone suggest any literature which dealt with such a problem ??
>
> With best regards,
>
> Jatinkumar Rana

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Message: 3
Date: Thu, 5 May 2011 10:59:52 -0400
From: Bruce Ravel <bravel at bnl.gov>
To: XAFS Analysis using Ifeffit <ifeffit at millenia.cars.aps.anl.gov>
Subject: Re: [Ifeffit] EXAFS on multi phase systems
Message-ID: <201105051059.52257.bravel at bnl.gov>
Content-Type: Text/Plain;  charset="utf-8"

Jatinkumar,

Shelly's paper on mixed phase uranyl species should be required
reading for anyone serious about EXAFS analysis.  It's not precisely
the scenario you ask about, but is sufficiently similar conceptually
that you would do well to study this paper carefully.

   Geochimica et Cosmochimica Acta 66:22, (2002), 3855-3871
   doi:10.1016/S0016-7037(02)00947-X

Like Scott, many of the people who respond frequently on this mailing
list have written papers that would be useful to study to understand
how to approach your problem.  A few minutes with Google Scholar
would populate a large and useful reading list.

Given that you specifically mentioned crystalline materials, you might
want to read up on DAFS.

B

On Thursday, May 05, 2011 10:46:33 am Scott Calvin wrote:
> Hi Jatinkumar,
>
> It's fairly common to do so. With linear combination analysis or
> principle component analysis, it's necessarily the case. But it's also
> done with modelling using FEFF. I personally have published many
> papers of this type. One early paper of mine that does this is:
>
> ?X-ray absorption spectroscopy of highly-cycled Li/CPE/FeS2 cells,? E.
> Strauss, S. Calvin, H. Mehta,* D. Golodnitksy, S. G. Greenbaum, M. L.
> denBoer, V. Dusheiko, and E. Peled, Solid State Ionics 164, 51 (2003).
>
> --Scott Calvin
> Sarah Lawrence College
>
> On May 5, 2011, at 12:26 AM, Jatinkumar Rana wrote:
> > Dear ifeffit users,
> >
> > I was wondering if one could apply EXAFS to multi-phase systems (e.g.
> > two phase systems) where both phases could be crystallographically
> > different but contain same absorbing atom.
> >
> > Can anyone suggest any literature which dealt with such a problem ??
> >
> > With best regards,
> >
> > Jatinkumar Rana

--

 Bruce Ravel  ------------------------------------ bravel at bnl.gov

 National Institute of Standards and Technology
 Synchrotron Methods Group at NSLS --- Beamlines U7A, X24A, X23A2
 Building 535A
 Upton NY, 11973

 My homepage:    http://xafs.org/BruceRavel
 EXAFS software: http://cars9.uchicago.edu/~ravel/software/exafs/

------------------------------

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