[Ifeffit] SO2 for samples with non-planar geometry

[Robert Gordon]

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 
>> <anatoly.frenkel at stonybrook.edu> wrote:
>>
>> Capillary made or what?
>>
>> Anatoly
>>
>>> On Apr 21, 2023, at 9:52 PM, Joel Brugger <joel.brugger at monash.edu> 
>>> wrote:
>>>
>>>  Fluo, 0.5 wt% Cu.
>>>
>>>> On 22 Apr 2023, at 11:41 am, Anatoly Frenkel 
>>>> <anatoly.frenkel at 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 at 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 at monash.edu <mailto:Andrew.Mackintosh at monash.edu>
>>>>> Twitter: @JoelBrugger
>>>>>
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