generated by phonopy
   1.0
     2.3047930587466308    1.3306728928937481    3.9918243638664532
    -2.3047930587466308    1.3306728928937481    3.9918243638664532
     0.0000000000000000   -2.6613457857874963    3.9918243638664532
Bi
   2
Direct
  0.7327839999999999  0.7327839999999999  0.7327839999999999
  0.2672160000000001  0.2672160000000001  0.2672160000000001
