Jon,

> One way to reduce "graininess" if you have a mixture of grains and
fine 
> powder: take the median when integrating around the rings instead of
the 
> mean. If you only have grains and no continuous rings then better to
do 
> the single crystal experiment...

While I can understand the general rationale for the idea (minimize the
weight of the very strong reflections to the final integrated intensity
for the reflection), could you expand further on your level of success
and any analysis you have carried out on this plan?  In particular, if
you or anyone else has anything out in print that discusses this I would
be very interested.


Bhuv,

You could also think of doing a pseudo-Gandolfi like data collection by
rotating about omega and phi simultaneously.  I think that even if you
have a fixed chi setup you can do it since I think that the chi is fixed
at close to the magic angle.

Thanks,  Alex Y


Dr. Alexandre (Alex) Yokochi
Assistant Professor
Department of Chemical Engineering
Oregon State University
Corvallis, OR 97331-2702

Phone:  (541)-737-9357
Fax:  (541)-737-4600
 


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