@misc{atsushi-a,
  title = {Ab-initio phonon calculation for KCaAl2F9 / C222_1 (20) / materials id 557743},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, KCaAl2F9, C222_1 (20)}
}