On 22 Apr 2023, at 11:57 am, Anatoly Frenkel <anatoly.frenkel@stonybrook.edu> wrote:

Capillary made or what?

Anatoly

On Apr 21, 2023, at 9:52 PM, Joel Brugger <joel.brugger@monash.edu> wrote:

Fluo, 0.5 wt% Cu.

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

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

Anatoly

On Apr 21, 2023, at 9:31 PM, Joel Brugger <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
Clayton, Victoria 3800
Australia

T: +61 3 9905 4898
E: Joel.Brugger@monash.edu
Twitter: @JoelBrugger

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