[phenixbb] pseudo-merohedral twinning or pseudo-symmetry?
Gino.Cingolani at jefferson.edu
Fri Oct 16 16:19:09 PDT 2009
I had a similar problem. Scaling statistics in P212121 were OK,
and - of course - no twinning was detected ... but nothing made sense during refinement. Looking at the data more carefully
I found that if one rescales in P21, the b-angle was stably
refined to 90.20 with ~30% better Rsym than in orthorhombic.
When running xtriage on the P21 data, I found the data were indeed "pseudomerohedrally-twinned" with twinning fraction ~0.38.
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