Hello,
sorry to appear too much last days but since people continue to comment the
problem of Alphar, my guess is that it might be a nice illustration to what
was discussed this week-end.
Since the crystal is very long in the c-direction (380 A) and relatively
short in two others (50 A), I suppose that not many (if any) low-resolution
reflections have been measured. If it is the case, a systematic absence of
the data, essentially most of them along the c*-direction, can cause such
"wave absence" of the density in the c-direction even when the phases are
exact.
Best regards,
Sacha
