We are still trying to tackle the problem of accurately fitting X'Pert Pro
XRD data with fundamental parameter peaks. There seems to be some kind of
difference between actual Soller slit acceptance angles and the values
required by XFit. We have two sets of Soller slits : 0.04 rad and 0.02 rad.
If I can still convert angles correctly (I'm beginning to doubt this), this
means acceptance angles of 2.3 deg and 1.15 deg. When these values are
applied to our spectrum of corundum (just a test sample we've taken that we
intend to replace by silver behenate or some other standard), the peaks come
out way too small and we need values of around 6 deg and 3 deg to get the
data to come out right. I don't suppose the strain or crystallite size
corrections should be that important (or are they ?) so we didn't use these.
Anybody ?
Sven Van den Berghe
