Thank you! There is no exact definition of the reference zone in the
HKL2000 manual. Given a reciprocal lattice observed from one direction,
there may be several RotXYZs to reach it. It might be that the reference
zone is a sampling parallelogram from the real space used to determine the
orientation difference with its counterpart(s) in reciprocal space that has
been established by reverse projecting of spots from the CCD to the Ewald
sphere. Thanks a lot!
Best wishes,
Shiqiang Lin
On Tue, May 13, 2014 at 5:14 PM, Felix Frolow mbfro...@post.tau.ac.ilwrote:
these are symmetry alternative choices of the cell axes
they sure are the same as there are 14 Bravais lattices
I guess it is not space group related.
they were introduced to maintain a precision of calculationI guess, so to
choose and alternative orientation were trigonometric parameters
are in the region were small change in angle does not bring large change
in the trigonometric function (or vice versa)
FF
Dr Felix Frolow
Professor of Structural Biology and Biotechnology, Department of
Molecular Microbiology and Biotechnology
Tel Aviv University 69978, Israel
Acta Crystallographica F, co-editor
e-mail: mbfro...@post.tau.ac.il
Tel: ++972-3640-8723
Fax: ++972-3640-9407
Cellular: 0547 459 608
On May 13, 2014, at 23:19 , 林世强 linshiqiang1...@gmail.com wrote:
Hi everybody! I met with a problem when I was reading the HKL2000 online
manual. It's the reference zone setup in the Step 11: What is the
reference zone? How is this useful? (page 38, figure 38). Does anybody
know the definition of reference zone, and why the reference zone setup
window seems always contain the same 10 options, h0l, hk0, l0h, kh0, ...,
0-kl? Thanks.
Best regards,
Shiqiang Lin
