[Pw_forum] ibrav = 13 monoclinic-base-centered unique axis

[Ludwig, Stephan]

Hello,



I want to work on a salt with space group monoclinic-base centered. This means ibrav=13 in th input file.

For simple monoclinic lattices there are two distinct possibilties to choose the unique axis (ibrav=12 or -12).

Ibrav=13 obviously chooses the c-axis to be the unique one.

Is there a possibility to choose the b-axis to be unique?



Thanks and regards



Stephan



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