I have three brief questions (number two should be the easy one). 1. Where could an extra electron density of an (physically impossible) additional molecule in an otherwise perfect map come from? (even in a wrong solution in a {probably} too high space group?)
2. I would like to see how my data looks like in a RvR plot. How can I make one? (Acta Cryst.D62, 83-95.) 3. Is it possible to have an order/disorder crystal defect with a pure rotational disorder, e.g. the unit cell translations are not affected by the disorder, only the orientations of the molecules in separate layers? Stefan