quantum-espresso/test-suite/ph_base/si.phG.in

phonons of Si at Gamma
 &inputph
  tr2_ph=1.0d-14,
  prefix='silicon',
  epsil=.true.,
  amass(1)=28.08,
  fildyn='si.dynG',
 /
0.0 0.0 0.0