Yes Ana, I agree although some non-merihedrals where the accident of cell dimensions mean many spots can overlap but not quite exactly can seem a bit smeary and "multiple. Meridral twins do not usually look multiple - they are usually only revealed by the 2nd moment and other stats.. Eleanor
On Wed, 17 Mar 2021 at 10:13, Ana Luísa Moreira de Carvalho <a...@fct.unl.pt> wrote: > Just a short note on this: I often see colleagues using the word > “twinning" when referring to a crystal that is actually multiple (not > single). > > I think much confusion arises from this. For me, a twin crystal is the one > that looks single under the microscope and only intensity statistics reveal > that the diffraction comes from more than one crystal. > > If a crystal looks multiple, i do not call it a twin. Am i being too > meticulous on this? > Thanks! > > On 16 Mar 2021, at 13:31, Eleanor Dodson < > 0000176a9d5ebad7-dmarc-requ...@jiscmail.ac.uk> wrote: > > You usually detect twinning most reliably from the intensity statistics - > CCP4I2 and Xtriage report those.. > Eleanor > > On Tue, 16 Mar 2021 at 07:31, Marina Gárdonyi < > marina....@pharmazie.uni-marburg.de> wrote: > >> Dear all, >> >> thanks to all who helped me solving the question. You sent me a lot of >> comments and information I have not taken into account. >> After reading all the answers, I have come to the conclusion that the >> spots that are very close to each other come from the long cell axis >> (57-57-160) and that twinning can probably not be seen in my case. I >> should have mentioned that the diffraction images came from an >> in-house x-ray machine, recorded with a 0.5 degree rotation range. >> >> Thank you all again! >> >> Kind regards, >> Marina >> >> -- >> Marina Gárdonyi >> >> PhD Student, Research Group Professor Dr. Klebe >> >> Department of Pharmaceutical Chemistry >> >> Philipps-University Marburg >> >> Marbacher Weg 6, 35032 Marburg, Germany >> >> Phone: +49 6421 28 21392 >> >> E-Mail: marina....@pharmazie.uni-marburg.de >> >> http://www.agklebe.de/ >> >> ######################################################################## >> >> To unsubscribe from the CCP4BB list, click the following link: >> https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 >> >> This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a >> mailing list hosted by www.jiscmail.ac.uk, terms & conditions are >> available at https://www.jiscmail.ac.uk/policyandsecurity/ >> > > ------------------------------ > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 > > > > ------------------------------ > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 > ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing list hosted by www.jiscmail.ac.uk, terms & conditions are available at https://www.jiscmail.ac.uk/policyandsecurity/
