@misc{atsushi-a,
  title = {Ab-initio phonon calculation for Rb2NaNb6(PO8)3 / C2 (5) / materials id 677731},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, Rb2NaNb6(PO8)3, C2 (5)}
}