Hi Li, There is nothing wrong with your opinion the expected redundancy is indeed 4 because, as you say, each reflection intersects the Ewald sphere twice, once through the top and once through the bottom (redundancy will actually be a bit less due to the missing cusp region).
Bart yang li wrote:
Hi: I am confused by a idea for a long time, and it maybe an easy question. That is, if a cryst with p1 spacegroup, after 360 degree data collection, what the redundancy should be? I was told that it is 2, and the 2 are F(h,k,l) and F(-h,-k,-l), but I think if the reciprocal lattice rotated 360 degree, it must intersect with the ewald sphere 2 times--for example, go into the sphere and go out--then F(h,k,l) should be collected twice. I donnot know what is wrong with my option. Anyone can tell me the reason? Thanks! Li Yang
-- ============================================================================== Bart Hazes (Assistant Professor) Dept. of Medical Microbiology & Immunology University of Alberta 1-15 Medical Sciences Building Edmonton, Alberta Canada, T6G 2H7 phone: 1-780-492-0042 fax: 1-780-492-7521 ============================================================================== -- ============================================================================== Bart Hazes (Assistant Professor) Dept. of Medical Microbiology & Immunology University of Alberta 1-15 Medical Sciences Building Edmonton, Alberta Canada, T6G 2H7 phone: 1-780-492-0042 fax: 1-780-492-7521 ==============================================================================
