&CONTROL
    pseudo_dir = '.'
    disk_io = 'none'
 /

 &SYSTEM
    ibrav = 2
    A = 5.431
    nat = 2
    ntyp = 1
    ecutwfc = 20.0
 /

 &ELECTRONS
    conv_thr = 1.0E-6
 /

ATOMIC_SPECIES
 Si  28.085  Si.pz-vbc.UPF

ATOMIC_POSITIONS crystal
 Si 0.00 0.00 0.00
 Si 0.25 0.25 0.25

K_POINTS automatic
  4 4 4 1 1 1