hi all,

not only fibre like, but single component fibre, and with the fibre axis
parrallel to the sample normal (i.e. "cyclic fibre". this is very
restrictive and generally does not correspond to the real texture.
Contrarilly to what has been said here or there, the March-Dollase does
not ensure PO normalisation, but only the normalisation of this single
component, there is then no physical restriction between all hkl lines in
terms of crystal angles, which gives rise to a lot of fitting space with
unreasonable solutions either in terms of QTA or QPA.
A physically based correction for PO needs the calculation of the ODF, and
more than a single pattern to be measured. But this is the price to pay
for a corect estimate of phase amounts in textured samples.


Daniel Chateigner
Bd. M. Juin
14050 Caen, France

Reply via email to