@misc{atsushi-a,
  title = {Ab-initio phonon calculation for Rb2NaErF6 / Fm-3m (225) / materials id 13815},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, Rb2NaErF6, Fm-3m (225)}
}