Well,
I do not work with metals and therefore my question could be somehow
naive.
Suppose you have such funny peaks and you are sure it is not due to
experimental conditions. How unique is than the interpretation offered by
Leonid ? Nothing presonal, of course :-)
lubo
On Mon, 15 Jun 2015, Leonid Solovyov wrote:
Dear Apu,
As the 2nd peak seems to be broader than the 1st one, the broadening is most
probably due to the stacking faults, typical for the close-packed metals. The
asymmetry and complexity of the broadening might also suggest the presence of
crystallites with different degree of faulting (and/or size). Among DDM (
http://sites.google.com/site/ddmsuite ) examples there is a model for Cu (
\DDM195d\EXAMPLES\Defects\Cu.ddm ), accounting for the influence of faults on
both peak broadening and intensities. It may also be applicable to Ni, but in
this particular case a two-phase model might be necessary to allow for the
presence of different crystalline fractions.
Best regards,
Leonid
*******************************************************
Leonid A. Solovyov
Institute of Chemistry and Chemical Technology
660036, Akademgorodok 50/24, Krasnoyarsk, Russia
http://sites.google.com/site/solovyovleonid
*******************************************************
________________________________
From: Apu Sarkar <apusar...@gmail.com>
To: "rietveld_l@ill.fr" <rietveld_l@ill.fr>
Sent: Monday, June 15, 2015 12:59 PM
Subject: Peak assymtery not able to fit
Hi,
I am working on a nanocrystalline Nickel sample. I am not able to fit the peaks
to get FWHM and Integral Breadth.
Please see the attached images. Fig. 1 shows the profile and a zoomed view of a
peak. Tail part of the peak is broader.
Fig. 2 shows the winplotr fit. It is not matching the max intensity.
Please give you suggestions to get a better fit for this kind of XRD peak.
Thanks
Apu
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