phonons of C at Gamma
 &inputph
  tr2_ph=1.0d-14,
  epsil=.true.,
  prefix='carbon',
  fildyn='Cg.dyn',
  amass(1)=12.0107,
  outdir='/home/sponce/program/espresso/tempdir/'
 /
0.0 0.0 0.0