quantum-espresso/test-suite/ph_interpol_metal/al.ph.in

DFPT for Al
 &inputph
  tr2_ph=1.0d-10,
  prefix='aluminum',
  fildvscf='aldv',
  amass(1)=26.98,
  outdir='./',
  fildyn='al.dyn',
  trans=.true.,
  ldisp=.true.,
  nq1=3, nq2=3, nq3=3
 /