Hi Yang,

The Mn standard reference "foil" is not good for S02 calculation. You are better off using a Mn sample that has the same kind of local environment as your unknown materials. If you have oxides, then get a good Mn-oxide reference material and use that.

Carlo

On Sat, May 14, 2022 at 6:34 AM Matt Newville <newville@cars.uchicago.edu> wrote:

Hi Yang,

On Thu, May 12, 2022 at 1:29 PM Hu, Yang (HIU) <yang.hu@kit.edu> wrote:
Dear IFEFFIT members,

I have been trying to obtain the S02 value from metal reference foils measured at the beamline.

How was your sample Mn metal prepared? Do you have verification that it is metallic?

When you say "from metal reference foils measured at the beamline.", I wonder if that might be the same kind of
"reference foil set" in the wooden jewelry box that we have at our beamline. Most of these are very good, while some (Pb) degrade over time. Ours has one labeled "Mn" which is obviously a black powder, probably sintered. I've never tried to analyze that as BCC Mn and assumed it was stable-ish, but not metallic. But maybe someone else has tried that.

--Matt
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Carlo U. Segre (he/him) -- Duchossois Leadership Professor of Physics

Professor of Materials Science & Engineering

Director, Center for Synchrotron Radiation Research and Instrumentation

Illinois Institute of Technology

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