Remember that it's all relative to the length of the FP vector. If your FP vector is small, then the f" component can substantially change the phase, even with a small f" component. So if you have measured a number of relatively weak reflections with minimal error, there is a substantial anomalous signal. If you have a huge FP vector, then you won't see much of a phase change. Bernie
On Wed, June 6, 2012 10:02 am, Dyda wrote: >>I suspect that pure MIR (without anomalous) was always a fiction. I doubt >> that anyone has ever used it. Heavy atoms always give >>an anomalous signal > >>Phil >
