[Ifeffit] Cementite EXAFS - thanks

Matt Newville newville at cars.uchicago.edu
Thu Sep 24 16:35:23 CDT 2009

Hi Bhoopesh,

It's amazing to me how many people have asked about this data set.

I did not prepare the sample of Fe3C measured for the data in the
model compound library.   Basically, a user interested in reduced iron
phases and with good knowledge of carbides showed up at the beamline
with a vial of black powder marked Fe3C.    We made a powder-on-tape
sample of this and measured it.  At the time, the user (who knows
about diamond synthesis and who I trust) said the sample was made by
another colleague.   Yes, it all sounds "secret formula", and I do not
know whether it is pure cementite.  If you're interested,  believe I
still have this sample in my Standards Notebook if you'd like to
measure XAFS or XRD on it.


On Thu, Sep 24, 2009 at 4:08 PM, Bhoopesh Mishra <bhoopeshm at gmail.com> wrote:
> Hi Scott and Mathew,
>       Thanks for pointing me to Matt Newville's archive. It is a great
> resource to have and I have used it on several occasions.
>      However, what I found on that database is "Fe3C". Since there are
> couple of different local environments for Fe3C, and not all of them are
> Cementite - I am not sure if that would be a good standard for me.
> Nevertheless, it served as a good starting point.
>    It would be great if Andrew can send us his data.
> Thanks again,
> Bhoopesh
> On Thu, Sep 24, 2009 at 11:54 AM, Scott Calvin <SCalvin at slc.edu> wrote:
>> Hi Bhoopesh,
>> There are files that are identified as cementite in Matt Newville's
>> archive:
>> http://cars9.uchicago.edu/~newville/ModelLib/search.html
>> If you manage to get any other data, let me know; I've used the
>> standard at the link above, but I'd like to confirm it.
>> --Scott Calvin
>> Sarah Lawrence College
>> On Sep 24, 2009, at 11:45 AM, bhoopeshm wrote:
>> > Dear All,
>> >           I am writing to see if anyone on this mailing list has
>> > ever measured "Cementite" (Fe3C) EXAFS. It is basically an Iron
>> > Carbide, nothing exotic at all.
>> >
>> >  I would be very grateful to anyone who might want to share an EXAFS
>> > spectrum of Cementite (Fe3C).
>> >
>> >
>> > Regards,
>> > Bhoopesh
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