Again, IMHO that difference is not significant. The significance is in the number of rejected reflections. If you get huge number of rejected reflections when you scale using cubic sg then your choice for rhombohedral (or lower) symmetry is justified. Interesting case, unless there is some twinning involved. Vaheh Oganesyan -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Green, Todd Sent: Friday, August 10, 2007 6:11 PM To: PHENIX user mailing list Subject: RE: [phenixbb] conversion from h3 to r3 with phenix apps i should have been more specific the angle should have been 89.978. also, when i process the data i get about 25% difference in r-merge between the rhombohedral(0.088) and cubic(0.112) space group. How significant is this difference? -Todd -----Original Message----- From: [email protected] on behalf of Oganesyan, Vaheh Sent: Fri 8/10/2007 4:43 PM To: PHENIX user mailing list Subject: Re: [phenixbb] conversion from h3 to r3 with phenix apps Todd, Having some experience with R3/R32 your choice for rhombohedral lattice seems a bit confusing. Are you sure the angles are 90,90,90? This might be cubic, IMHO. Vaheh Oganesyan -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Green, Todd Sent: Friday, August 10, 2007 5:29 PM To: [email protected] Subject: [phenixbb] conversion from h3 to r3 with phenix apps Hello all, I have what i believe to be a rhombohedral crystal that has an insanely large cell with the hexagonal setting: 533.026 533.026 652.887 90.000 90.000 120.000 and a modestly large cell comparatively with the rhombohedral setting: 377 377 377 90 90 90 I should be able to easily reindex to the smaller cell in scalepack but for some reason i'm not getting it to work correctly. Rather than struggle further on a friday afternoon, i figured that i'd give a phenix app a try. i assume xtriage can do this, can someone point me in the correct direction? thanks in advance- Todd This email was scanned with Mcafee's Anti-Virus appliance, but this is no guarantee that no virus exists. You are asked to make sure you have virus protection and that it is up to date.