@misc{atsushi-a,
  title = {Ab-initio phonon calculation for Na21S7Cl(O14F3)2 / P31m (157) / materials id 680169},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, Na21S7Cl(O14F3)2, P31m (157)}
}