[Ifeffit] Ifeffit Digest, Vol 189, Issue 2

Fri Nov 2 08:13:52 CDT 2018

If the sample is not homogeneous, it doesn’t matter if you use EXAFS or XANES spectra, they originate from the same atoms. 

Anatoly

> On Nov 2, 2018, at 2:39 AM, Raj kumar <rajrk37 at gmail.com> wrote:
> 
> Dear Anatoly and Marcus,
> 
> Thanks for your answers. So in this case, i understood, I shouldn't use the extended XAFS region for the analysis. In the other hand, is it allowed to cut the region till 9150 eV and use the data for the XANES analysis?
> 
> Regards,
> Raj
> 
> 
>> On Thu, Nov 1, 2018 at 11:37 PM <ifeffit-request at millenia.cars.aps.anl.gov> wrote:
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>> Today's Topics:
>> 
>>    1. Re: Bump/oscillating pattern at high energies of EXAFS
>>       (Anatoly Frenkel)
>>    2. Re: Bump/oscillating pattern at high energies of EXAFS
>>       (Matthew Marcus)
>>    3. EXAFS of wine (Anatoly Frenkel)
>> 
>> 
>> ----------------------------------------------------------------------
>> 
>> Message: 1
>> Date: Thu, 1 Nov 2018 17:47:56 -0400
>> From: Anatoly Frenkel <anatoly.frenkel at stonybrook.edu>
>> To: XAFS Analysis using Ifeffit <ifeffit at millenia.cars.aps.anl.gov>
>> Subject: Re: [Ifeffit] Bump/oscillating pattern at high energies of
>>         EXAFS
>> Message-ID:
>>         <CAFsMoZbm2RMVUeRmuoryw9ehVrZQcvx60zHqufmK39oLRoyZ2w at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>> 
>> It is an effect of inhomogeneity of the sample, that is, the variation in
>> the metal density throughout the X-ray beam footprint.
>> Anatoly
>> 
>> 
>> 
>> On Thu, Nov 1, 2018 at 5:34 PM Raj kumar <rajrk37 at gmail.com> wrote:
>> 
>> > Dear All,
>> >
>> > I have monitored the growth process of YbVO4 nanoparticles using EXAFS.
>> > Here, nanoparticles were synthesized in water medium. Both initial and
>> > final products (EXAFS) of the synthesis were measured using the continuous
>> > flow approach whereas the intermediate products were recorded, in the glass
>> > capillary, using the stopped flow. In the attached figure, you can find the
>> > same (all products). At high energies of EXAFS, both initial and final
>> > measurements show smooth behavior whereas the oscillating pattern/bump was
>> > observed for the intermediate states.
>> >
>> > Here, my question is: Is the oscillating pattern appearing in the
>> > intermediate states due to the sedimentation/in-homogeneity of the product
>> > in the capillary or it is the characteristic of the synthesis?
>> >
>> > With regards,
>> > Raj
>> > _______________________________________________
>> > Ifeffit mailing list
>> > Ifeffit at millenia.cars.aps.anl.gov
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>> ------------------------------
>> 
>> Message: 2
>> Date: Thu, 1 Nov 2018 14:55:12 -0700
>> From: Matthew Marcus <mamarcus at lbl.gov>
>> To: ifeffit at millenia.cars.aps.anl.gov
>> Subject: Re: [Ifeffit] Bump/oscillating pattern at high energies of
>>         EXAFS
>> Message-ID: <f870a845-0357-a1ad-263d-2f1b62b477ef at lbl.gov>
>> Content-Type: text/plain; charset=utf-8; format=flowed
>> 
>> Agreed.  The low frequency and high amplitude at the end is implausible as EXAFS.
>> 
>> Sincerely,
>>     Matthew Marcus
>> > It is an effect of inhomogeneity of the sample, that is, the variation in the metal density throughout the X-ray beam footprint.
>> > Anatoly
>> > 
>> > 
>> > 
>> > On Thu, Nov 1, 2018 at 5:34 PM Raj kumar <rajrk37 at gmail.com <mailto:rajrk37 at gmail.com>> wrote:
>> > 
>> >     Dear All,
>> > 
>> >     I have monitored the growth process of YbVO4 nanoparticles using EXAFS. Here, nanoparticles were synthesized in water medium. Both initial and final products (EXAFS) of the synthesis were measured using the continuous flow approach whereas the intermediate products were recorded, in the glass capillary, using the stopped flow. In the attached figure, you can find the same (all products). At high energies of EXAFS, both initial and final measurements show smooth behavior whereas the oscillating pattern/bump was observed for the intermediate states.
>> > 
>> >     Here, my question is: Is the oscillating pattern appearing in the intermediate states due to the sedimentation/in-homogeneity of the product in the capillary or it is the characteristic of the synthesis?
>> > 
>> >     With regards,
>> >     Raj
>> >     _______________________________________________
>> >     Ifeffit mailing list
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>> > 
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>> 
>> 
>> ------------------------------
>> 
>> Message: 3
>> Date: Thu, 1 Nov 2018 18:27:00 -0400
>> From: Anatoly Frenkel <anatoly.frenkel at stonybrook.edu>
>> To: ifeffit at millenia.cars.aps.anl.gov
>> Subject: [Ifeffit] EXAFS of wine
>> Message-ID: <89961ADD-53B5-4682-BCDE-2A447FB6A278 at stonybrook.edu>
>> Content-Type: text/plain; charset="us-ascii"
>> 
>> I thought this mailing list is an appropriate venue to post a picture of the bottle of wine I bought yesterday in a store on Long Island. 
>> 
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>> 
>> Anatoly
>> 
>> ------------------------------
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>> Subject: Digest Footer
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>> ------------------------------
>> 
>> End of Ifeffit Digest, Vol 189, Issue 2
>> ***************************************
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