I would expect that if you found HA sites in C222 then they must obey
C222 symmetry?
Why not just repeat the search in C2221 and see if you get a better answer?
Going back a stage:
Arent you able to guess whether there is a screw axis from your absences
along 00l?
Pointless gives a good analysis of likely SGs from these sorts of
considerations.
The results are good if
a) you have actually measured the 00l line, and
b) you dont have a non-crystallographic translation with coordinates,
x,y,1/2.
Both ctruncate (part of the scale and merge task) or sfcheck will test
for this.
Eleanor
Francis E Reyes wrote:
> Hi all
>
> I did some HA searching and found some sites in C222 that seem to be
> NCS related. Any ideas on how to determine whether or not the space
> group is really C2221 from these sites?
>
> Thanks
>
> FR
>
> ---------------------------------------------
> Francis Reyes M.Sc.
> 215 UCB
> University of Colorado at Boulder
>
> gpg --keyserver pgp.mit.edu --recv-keys 67BA8D5D
>
> 8AE2 F2F4 90F7 9640 28BC 686F 78FD 6669 67BA 8D5D
>
>
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