Re: cif files for austenite

[Alan Hewat]

 I am looking for cif files for austenite and I
 didn’t find it in WEB free database or in ICSD database.

Frank is quite correct here. Austenite is gamma-iron, which you can find
immediately with Google or Wikipedia:
http://en.wikipedia.org/wiki/Austenite

Small amounts of carbon or hydrogen dissolved in gamma-iron, as reported
in ICSD, is not going to change the X-ray pattern, since Fe-scattering
will dominate. ICSD only reports what people publish. I believe the 1970
X-ray paper on austenite listed in ICSD only reports the lattice
constants, and doesn't actually claim to locate the carbon.

Alan.
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Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
[EMAIL PROTECTED] +33.476.98.41.68
  http://www.NeutronOptics.com/hewat
__

Re: cif files for austenite

[Alan Hewat]

 The next step would be quantify these phases by Rietveld method using
TOPAS 3.0.

BTW, it shouldn't need a sophisticated Rietveld refinement to distinguish
between the relative quantities of simple FCC and BCC compounds - some
peaks may overlap almost completely, but others not at all.

I worry that people rely so much on databases and computer programmes, and
so little on thinking.

Alan.
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Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
[EMAIL PROTECTED] +33.476.98.41.68
  http://www.NeutronOptics.com/hewat
__