Hi Armel:
I am impressed -- nice report:-)
One comment regarding ARIT. I didn't go carefully through all the results
but my impression is your values are a bit underestimated. If you added
additional Gaussian term to your An, you should get results much closer to
WA. That should be relatively simple in your model (I think:-)? Of course,
that is probably an oversimplification again, but it would get you much
closer to the real thing?
In any case, thanks much for all your help and for participating.
Best, Davor
----- Original Message -----
From: "Armel Le Bail" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, November 16, 2000 8:16 AM
Subject: Size/Strain Round Robin and Rietveld method
> Hello,
>
> For the impatients wishing to compare (I am - why
> waiting so long...), here are some Size/Strain
> Round Robin results from a participation by using
> a Rietveld program :
>
> http://sdpd.univ-lemans.fr/microstruct/ssrr/
>
> Owing to the simplicity of the CeO2 pattern (no
> overlapping), a Rietveld program is certainly not
> the best possible approach to microstructures.
>
> However, it is interesting to know how accurate
> the results are in such a case, in order to have
> an idea of the confidence level when overlapping
> precludes the use of all methods but the whole
> powder pattern fitting ones ;-).
>
> The ARIT program used here is a dinosaurian which has
> not evolved that much since 1984 (XIIIth IUCr Congress,
> Hamburg). But it is still able to propose a mean size,
> a variation law of the distortion versus the distance
> to an arbitrary origin, and a microstrain value.
>
> Hoping to see results from other participants too,
> before the publication of the official comparison.
>
> Best,
>
> Armel Le Bail
> http://www.cristal.org/
>
> PS - Are the results from the Quantitative Phase
> Analysis Round Robin available somewhere, or at
> least some participant results ? Nothing new at
> the What's New CPD Web page since 8th November 1999 :
> http://www.iucr.org/iucr-top/comm/cpd/QARR/whatsnew.htm
> Some Rietveld method packages participated, certainly ?
>
>
