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Dear all,

I would like to know how if it is possible to compute vibrational frequencies along specific directions of the BZ, let's say Gamma-X for instance.

For IBRION=5 or 6, it is written in the manual that "Only zone centered (Gamma-point) frequencies are calculated automatically". Is it the same for IBRION = 7 or 8?

For large supercell calculations, the BZ is much smaller, does it mean that the Gamma-point frequencies are sufficient? Just like it works for the kpoint grids?

Thank you for your anwsers.

Regards.

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