Re: TCH

Armel Le Bail ( armel@fluo.univ-lemans.fr )
Wed, 1 May 1996 14:15:26 +0200

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>When comparing stirred and unstirred samples, the mean coherence lengths
>(from Lorentzian) show systematic differences and the strain does this too.

>Question: How are both profile contributions influenced by CHANGES in
>PARTICLE size DISTRIBUTIONS ??

No way if you impose profiles to be Lorentzian : you may change only
the mean size but the size-distribution will be always a half-Lorentzian.

Only one response for the relation size distribution (P(n))-profile (f(x)):
f(x)= Sum A(n) cos(2pinx/a)
A(n) = 1/N3 Sum (i-|n|)P(i)

Lorentzians are a quite particular case of the above equations.

See Chapter 13 in "X-Ray Diffraction", B.E. Warren, Addison-Wesley (1969).

Armel

Armel Le Bail, Laboratoire des Fluorures URA CNRS 449
Faculte des Sciences, Universite du Maine, F-72017 Le Mans, France
Tel: (33) 43 83 33 47 Fax: (33) 43 83 35 06
Email: armel@fluo.univ-lemans.fr or armel@ONE.univ-lemans.fr
Home Page: http://fluo.univ-lemans.fr:8001/

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