Re: [Ifeffit] SO2 for samples with non-planar geometry

Hi Joel, How much edge shift are you seeing between your foil and the solution? Cu+2 is about 4.5 eV up from Cu metal...you seeing about that much? Cu+2 can photoreduce...I know Cu+(aq) isn't stable, but maybe some complex is forming? Just a thought...CN=2 and I think linear Cu+ -R. On 2023-04-21 6:58 p.m., Joel Brugger wrote:

Capillary is silica glass :-)

...

On 22 Apr 2023, at 11:57 am, Anatoly Frenkel wrote:

Capillary made or what?

Anatoly

...

On Apr 21, 2023, at 9:52 PM, Joel Brugger wrote:

 Fluo, 0.5 wt% Cu.

...

On 22 Apr 2023, at 11:41 am, Anatoly Frenkel wrote:

Fluorescence or transmission? What is the Cu concentration? Could be self absorption.

Anatoly

...

On Apr 21, 2023, at 9:31 PM, Joel Brugger wrote:

 Dear list,

We are trying to fit EXAFS from data collected on solutions within a capillary. The capillary has OD 1mm, ID 0.8mm, and was placed horizontally. The beam is 1x2 mm (VxH).

Fitting the copper reference foil, we get the expected SO2 value of ~0.7.

However, the solution containing the Cu(II) aqua ion gives a coordination of 2, instead of the expected 5-6. So our SO2 for this solution is apparently ~0.25.

I couldn’t find a discussion of the effect of geometry (in our case cylindrical rather than planar) on SO2. Is it possible that the low SO2 is a result of the odd geometry?

Confused as ever,

JOEL

*Joël Brugger* Professor of Synchrotron Geosciences

*Monash University* School of Earth, Atmosphere and Environment Room 257A, Level 2, 9 Rainforest Walk x-apple-data-detectors://2 Clayton, Victoria 3800 x-apple-data-detectors://2 Australia x-apple-data-detectors://2

T: +61 3 9905 4898 tel:+61%203%209902%209095 E: Joel.Brugger@monash.edu mailto:Andrew.Mackintosh@monash.edu Twitter: @JoelBrugger

_______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit

---

Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit

_______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit

_______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe:http://millenia.cars.aps.anl.gov/mailman/options/ifeffit