On Thu, 21 Dec 2000, Dr.Joerg Bergmann wrote:
> On Thu, 21 Dec 2000, Daniel M. Toebbens wrote:
> ...
> > However, irc the use of variable divergent slits should be discouraged in
> > Rietveld refinement since it results in wrong atomic displacement
> > parameters.
>
> This is not valid, in general. The problem is: Most Rietveld
> programs are unable to deal with the different profile behaviour
> using variable divergence slits. This causes intensity errors. If one
> uses the right profile description, all goes OK. See www.bgmn.de/vardiv.html
But one of the main sources of intensity errors was the limited precission
of the variable divergent slits itself. If those do not move in the very
correct position this results in intensity errors, which are typically
systematic.
Yours,
Daniel Toebbens
--
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