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
>
>
>
>
--
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All Things Serve the Beam
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David J. Schuller
modern man in a post-modern world
MacCHESS, Cornell University
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