The general rule is that a Patterson peak should be ~ 20% of the origin before considering it significant so none of those would really need to be considered. Eleanor
On 25 February 2013 12:48, Michele Lunelli <efu...@yahoo.it> wrote: > Dear all, > > I have an orthorhombic crystal (pointless suggests most likely space > groups P 2 21 21 or P 2 21 2) with two molecules expected in the asymmetric > unit. Analyzing the native Patterson map I found the following peaks (in > fractional coordinates): > > CELL 63.0400 117.2500 133.6500 90.0000 90.0000 90.0000 > ATOM1 Ano 0.0000 0.0000 0.0000 111.03 0.0 BFAC 20.0 > ATOM2 Ano 0.0102 0.0416 0.0000 15.98 0.0 BFAC 20.0 > ATOM3 Ano 0.0000 0.5000 0.0037 6.21 0.0 BFAC 20.0 > ATOM4 Ano 0.0669 0.0850 0.0000 5.86 0.0 BFAC 20.0 > ATOM5 Ano 0.0772 0.4168 0.0000 5.78 0.0 BFAC 20.0 > ATOM6 Ano 0.1139 0.1196 0.0049 5.10 0.0 BFAC 20.0 > > The third and fifth are far enough from the origin to represent > tranlations. Is the third due to an alternative origin? Could the fifth > represent a pseudo-translation? > > > Thanks, > Michele >
