@misc{atsushi-a,
  title = {Ab-initio phonon calculation for Ba7Na3Ti7Nb3O30 / Pm (6) / materials id 695409},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, Ba7Na3Ti7Nb3O30, Pm (6)}
}