Coincidentally, I just spent my day trying to index a lattice of ~ 10 x
10 x 11 A.
Mounting samples: if the compound is stable, just glue it to the end of
a steel pin. No muss, no fuss.
We had to attenuate our synchrotron beam heavily to make it work; motors
can only turn so fast.
We did 10 degree rotations to get enough spots per frame per imaging.
Detector setup allowed for ~ 1 A resolution.
Indexing was a challenge for many of the samples, heavily overloaded
spots and streaks seemed to be causing the most problems.
We tried various of the usual macromolecular programs for indexing;
HKL2000, iMosFlm, XDS, DPS. None of them seem to be optimised for this,
but some of them actually worked in some instances.
On 03/24/14 14:04, Andreas Förster wrote:
Dear all,
I've been approached by a materials student with a petri dish full of
big, sturdy, salty, yellow crystals. He claims I have the best kit
for single-crystal diffraction on campus.
I would very much appreciate advice on how to deal with this, anything
in the range from "won't work" to "use software X to analyze data in
space group P-43N" would be welcome.
Thanks.
Andreas
--
=======================================================================
All Things Serve the Beam
=======================================================================
David J. Schuller
modern man in a post-modern world
MacCHESS, Cornell University
[email protected]
