Dear all,
thank you for your replies, they are very helpful and instructive.
The data is from id06, collected using an image-plate detector, then
integrated.
The files contain 2Thetha and intensities; sigmas were taken as
square-root of the intensities.
Christina
Quoting Andy FITCH :
Dear Christina,
Chi2 may be small because of a high noise, so it indicates that the
model is over-refined with respect to the quality of the data (quick
collection using analyzer crystal). This is a trivial case and you
can't help it.
The other (more likely) option is that you have low-noise dat
Am Dienstag, den 23.03.2010, 08:56 + schrieb Christina Drathen:
> Dear all,
>
> I am working on a refinement of synchrotron-X-ray powder data; the fit
> is ok (though certainly not perfect) but I ended up with a confusingly
> small reduced chi^2:
> Rp = 23.4%
> wRp = 16.9%
> F^2 = 18.6%
> chi^
Ignore it and mind the refined structural data ...
Lubo
On Tue, 23 Mar 2010, Christina Drathen wrote:
Dear all,
I am working on a refinement of synchrotron-X-ray powder data; the fit
is ok (though certainly not perfect) but I ended up with a confusingly
small reduced chi^2:
Rp = 23.4%
wRp
Dear all,
I am working on a refinement of synchrotron-X-ray powder data; the fit
is ok (though certainly not perfect) but I ended up with a confusingly
small reduced chi^2:
Rp = 23.4%
wRp = 16.9%
F^2 = 18.6%
chi^2 = 0.755
(1733 observations, 15 variables).
I would be very grateful for any sugge
