Dear colleagues, I have a crystal with space group P21212 and merohedral twinning according to "-h, l, k" twin law. If I click "twin" in the interface, REFMAC5 recognizes a different twin law and does not refine the structure properly. Is there a way to tell REFMAC5 the proper twin law? I tried to find the information in the documentation, but I failed. This is an older project running under i, not i2. Best regards, Petr
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