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Fe2+ is notoriously sensitive. I think TiCl4 (a liquid) is used to test dryboxes because it hydrolyzes easily with production of white smoke if exposed to water vapor. If a small amount of this were mixed into a degassed binder, its XANES would presumably show the effect of hydrolysis. As has been mentioned, Li-containing materials such as Li2FePO4 are sensitive. Removing the Li by oxidation or hydrolysis would cause the Fe to oxidize to Fe3+.
Sincerely,
Matthew Marcus
On 2/21/2024 10:44 AM, Gerald T. Seidler wrote:
> Dear XAFS community, We've been developing air-sensitive sample cells for several of our XAFS experiments, but we don't have a good way of characterizing how well they actually reject air and water. Does anyone have recommendations
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> Dear XAFS community,
> We've been developing air-sensitive sample cells for several of our XAFS experiments, but we don't have a good way of characterizing how well they actually reject air and water. Does anyone have recommendations for easily available 3d transition metal compounds that have a 'reasonable' amount of air sensitivity for purposes of sample call validation? Any suggestions for other methods to validate performance? We would grind the sample and form a pellet with a degassed binder, in a glovebox or glovebag.
> With thanks,
> Jerry
>
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> /Gerald Seidler/
> /Professor, Physics Department
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