>
> >Presume one of your students makes a fit on a sample having only size
> >anisotropy and he is able to determine the six parameters of the
ellipsoid.
> >But after that he has a funny idea to repeat the fit changing (hkl) into
> >equivalents (h'k'l'). He has a chance to obtain once again a go
He could ask the master how is the nature so perfect.
Or could conclude by himself that powders are not single
crystals, so that symmetry may lead to systematic overlap
and irrecoverable loss of information.
Yes, anisotropic line broadening is rarely observed
with cubic compounds unless in very sp
I just wanted to add my 2 cents to this argument...
I think one big point in all the discussion on size and strain concerns
the difference between what IS in the specimen, what we see with our
probe (X-rays or neutrons, presumably) and what we reconstruct using A
model. In most cases the model
> Not violating symmetry restrictions you may either
> have the sphere with the terms 11=22=33 and 12=13=23=0
> or something else allowing the 12=13=23 terms to be equal
> but different from 0. These two possibilities are all you can do
> in cubic symmetry with h,k,l permutable. If I am not wrong.
Not violating symmetry restrictions you may either
have the sphere with the terms 11=22=33 and 12=13=23=0
or something else allowing the 12=13=23 terms to be equal
but different from 0. These two possibilities are all you can do
in cubic symmetry with h,k,l permutable. If I am not wrong.
The (111)
(you could be a good boxeur, Armel!),
Knocked out at round 4 ! Argh !
Anyway, a sphere was good enough for the previous
size-strain round robin... Hope that the next size-strain
round robin will be more complex, and will succeed
in excluding definitely any ellipsoid from the ring.
Armel
>
> >(you could be a good boxeur, Armel!),
>
> Knocked out at round 4 ! Argh !
Some people believe that "fair play" is mainly an Anglo-Saxon apanage
(prerogative). Obviously they are wrong.
>
> Anyway, a sphere was good enough for the previous
> size-strain round robin... Hope that the next siz
