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Dear vasp users,
I want to do a phonon calculation using GGA approximation. For accurate calculation should I do the calculation from the scratch or first I calculate the GGA sel consistent eun and then from that WAVECAR and CHARGCAR phonon is to be calculated. Can u please help in this case. Thanks.

Hi

I guess the best thing to do would be to first run a calculation with a very high convergence criterium in order to get accurate wave functions.

Then you use the wavecar file as an input for the phonon calculation.

B.

Thank you very much boris.