Dear Smith, Here are some resources, I would then google around any topics or terms that are unclear.
http://mcl1.ncifcrf.gov/dauter_pubs/284.pdf http://www.ruppweb.org/Xray/comp/space_instr.htm See page 3 for an example using P 1 21 1: http://xray.tamu.edu/pdf/notes/guidetospacegroups.pdf Take Care, Sean Seaver, PhD P212121 http://store.p212121.com/ ------ Dear All, Alhough there are on-line explainations on the space group, I found it was difficult to fully understand. Here we take P 1 21 1 as an exmaple, will you please explain to me with easy language what each number indicates？Or do we have a on-line server which can demonstrate the meaning of each number? How can we get out crystal arrangement with repeating the unit cell in the format of space group? Smith
