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 ?
