11 Nov
2011
11 Nov
'11
3:53 p.m.
On Fri, Nov 11, 2011 at 9:47 AM, Green, Todd
the true space group is C2. Are these r-values too low? does the difference in values according to each twin law mean something?
I don't know enough to answer the rest of the question, but one thing to look out for is how you generate the R-free flags - which program did you use, and when you reprocessed in C2, did you generate a new set of R-free flags? If you're not careful with this, you can end up severely biasing R-free when performing twinned refinement. -Nat