[Ifeffit] Cementite EXAFS - thanks
bhoopeshm at gmail.com
Thu Sep 24 16:49:46 CDT 2009
I imagined you might not remember about the data or how was it
prepared, so I decided not to bother you asking about it. But sounds like
you do have an amazing memory.
Yes, I would be happy to characterize the sample by running both EXAFS
and XRD on it if you still have it. I would of course share the information
with the mailing list, once I characterize it. I will collect the sample
from you sometime soon. Thanks again for offering.
On Thu, Sep 24, 2009 at 4:35 PM, Matt Newville
<newville at cars.uchicago.edu>wrote:
> 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>
> > 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<http://cars9.uchicago.edu/%7Enewville/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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