@misc{atsushi-a,
  title = {Ab-initio phonon calculation for Ba2Ti2Si2O9F2 / Pbca (61) / materials id 557968},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, Ba2Ti2Si2O9F2, Pbca (61)}
}