It'll depend on your data, but you'd probably be better off using the
inflection (rather than peak) and remote datasets for dispersive
difference maps. This signal is usually fairly weak to begin with, and
not using the infection datasets weakens it further.
Pete
FWIW - my understanding is that "dispersive" is often used to
distinguish differences in f' from Bijvoet differences (in f'') during
MAD, at least when treating MAD as MIRAS.
Jacob Keller wrote:
Dear Crystallographers,
it seems to me that for clearly identifying/characterising anomalous
scatterers for a solved structure, one could make a map using two
datasets: one at the f" peak, one low energy remote. One would then
use the signal both from the Bijvoet differences in the peak dataset
plus the differences between the peak and low-energy datasets, which I
think I have seen called "dispersive" differences. I guess this would
be like a MAD map, but using pre-existing model phases--is there such
an animal in the software, or would it even be helpful?
Jacob Keller
