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

Capillary is silica glass :-)

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

Capillary made or what?

Anatoly

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

Fluo, 0.5 wt% Cu.

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On 22 Apr 2023, at 11:41 am, Anatoly Frenkel mailto:anatoly.frenkel@stonybrook.edu> wrote:

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

Anatoly

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On Apr 21, 2023, at 9:31 PM, Joel Brugger mailto:joel.brugger@monash.edu> 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

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