&CONTROL
  calculation = 'relax'
  etot_conv_thr = 1.0d-7
  forc_conv_thr = 1.0d-4
  nstep = 40
  prefix = 'si'
  outdir = './tmp'
  pseudo_dir = '../pseudo'
  tprnfor = .true.
  tstress = .true.
/
&SYSTEM
  ibrav = 2
  A = 5.397607551
  nat = 2
  ntyp = 1
  ecutwfc = 60
  ecutrho = 640
  occupations = 'fixed'
/
&ELECTRONS
  conv_thr = 1.0d-10
/
&IONS
  ion_dynamics = 'bfgs'
/
ATOMIC_SPECIES
Si 28.085 Si.pbe-n-rrkjus_psl.1.0.0.UPF
ATOMIC_POSITIONS alat
Si 0.00 0.00 0.00 0 0 0
Si 0.27 0.25 0.25 1 1 1
K_POINTS automatic
8 8 8 0 0 0