The datasets are ASCII data represending phonon dispersion curves in a simple tight-binding model as introduced and described in the manusript entitled " Microscopic flexoelectricity in the canonical PMN relaxor" available at ArXive. These data can be easily generated from the procedure given in the paper. In fact, the data are provided mainly to comply with formal requirements of the funding body, but in principle might be useful e.g. for some students. Author discourage anybody from using these data without reading the content of the paper. Data to fig 1 and 2 arranged in columns in the usual way.