Twinning by Pseudo Merohedry in SHELXL: Generation of TWIN Law for a pseudomerohedral twin structure

[@himandevsingh402]

Thanks for uploading such useful videos. I have a query. I have crystal structure which solves very well in triclinic (R value = 4%). But platon shows it needs to be solved in higher symmetry i.e Orthorhombic....but I am not able to get the structure at all in Orthorhombic. Please comment

[@DrKuldeepMahiya]

Is XPREP suggest for higher symmetry ? If it suggests, then you can try. You can also check AddsymSHX option in PLATON. Hope this will help. Good luck.

[@SandeepKumar-xg9je]

Sir, your videos are really very helpful to us. I have one question regarding twinning. I was trying to apply twinrot mat in Platon but it is showing a message " Sorry no analysis , when weight parameter a negative". what to do?

[@DrKuldeepMahiya]

Thank you for the feedback Sandeep. Check the weighting parameters in .ins file. If still the problem not solved, please send your data. I have to look it.