[Ifeffit] Cementite EXAFS

Bhoopesh Mishra bhoopeshm at gmail.com
Thu Sep 24 13:16:15 CDT 2009

Hi Andrew,
       Thank you so much for your reply. I could run a sample myself but
that can not happen in next few weeks (until my next beamtime). I would be
very thankful to you if you could send me your spectrum. I need to use it as
a standard.


On Thu, Sep 24, 2009 at 12:42 PM, Andrew <acampo2 at tigers.lsu.edu> wrote:

> Bhoopesh,
> There's a paper which says how to make it if you want to run it on your
> own:
> "Fe3C, which can form during FTS reactions, was prepared by
> temperature-programmed reaction (0.167 K/s) of
> Fe2O3 up to 973 K using CO (Matheson, 99.99%, 107 mol of CO/mol of Fe h) as
> the reduction and carburization agent.
> The resulting Fe3C powder was passivated in flowing 1% O2/ He (Matheson,
> 99.999%, 0.05 mol/h) at room temperature (RT) for 1 h before removing the
> sample from the synthesis cell." [1]    S. Li, G.D. Meitzner and E.
> Iglesia,
> J. Phys. Chem. B, 105 (2001) 5743.
> I made some myself using this method. I would send my spectrum, but if I
> can
> recall we had glitches in the EXAFS region.
> Andrew Campos
> ** If you want other iron carbides, this will be quite tricky since this is
> the only one that can be synthesized to a pure extent... obviously one
> could
> make cementite to using an iron melt but that requires really high
> temperature furnaces etc.
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