Hello Miguel,
I don't think there are some theorical proof for this assumptions.
Experimental evidences show that in fact a lorentzian shape is due to a
distibution of size of cristallites.
There are numerous publications on this subject (after Klug and Alexander
book) for instance:
Effect of crystallite size distribution on X-ray diffraction line profile
and whole-pattern-fitting.
Langford, louer, Scardi (J Applied Crystallography (2000) 33, 964-974)
On the applicability of the x-ray diffraction line profile analysis in
extracting grain size and microstrain in nanocristalline materials.
Jiang, Ruhle, Lavernia (J Materials Research Vol 14 N�2 feb 1999)
Patrick
At 16:53 05/10/2000 CDT, you wrote:
>Hello to everyone!
>
>I'm working in crystal size and microstrain. I have read that broadening due
>microstrain is related to a gaussian profile and size broadening is related
>with a lorentzian profile, but i have not find a reason to explain these
>assumptions, could you help me?
>
>Thanks in advance
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Patrick Weisbecker
LSG2M
Ecole des Mines de Nancy
Parc de saurupt
54042 Nancy
email: [EMAIL PROTECTED]
