You said: > 8) Processed in P6, P312 and P321, all of course suggest twinning.
These will all suggest partial twinning, but not necessarily perfect twinning. I would start to consider twinning a possibility if the statistics for these lower symmetry space groups suggest a partial twin fraction of near 0.5 _and_ perfect twinning, or if the stats suggest partial twinning with a lower twin fraction. Xtriage gives a nice summary analysis of this. You should read the output at the bottom of the xtriage log and go from there. Your apparent psuedo-translational symmetry will confound some statistical measures of twinning, so I would pay particular attention to the "l" statistic developed by Padilla and Yeates and implemented in xtriage (and other packages). Josh _____________________________________________ - Joshua Warren, PhD ([EMAIL PROTECTED]) - - 212 Nanaline H. Duke - - DUMC - - home: (919) 918 7860 - - work: (919) 681 5266 - _____________________________________________
