On Thu, Oct 14, 2010 at 04:28:26PM -0500, Jacob Keller wrote: > I have always found this angle independence difficult. Why, if the anomalous > scattering is truly angle-independent, don't we just put the detector at 90 > or 180deg and solve the HA substructure by Patterson or direct methods using > the pure anomalous scattering intensities? Or why don't we see pure > "anomalous spots" at really high resolution? I think Bart Hazes' B-factor > idea is right, perhaps, but I think the lack of pure anomalous intensities > needs to be explained before understanding the angle-independence argument. > We don't do this because your crystal is angle dependent - it usually does not have the required degree of order to scatter thus far, so the anomalous signal drowns in the noise.
> JPK -- -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen phone: +49 (0)551 39 22149 GPG Key ID = A46BEE1A
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