&control
    calculation='scf',
    restart_mode='from_scratch',
    prefix='si'
    pseudo_dir = '/home/lambert/espresso-4.2.1/pseudo/',
    outdir='./'
 /
 &system
    ibrav = 2, celldm(1) =10.20, nat=  2, ntyp= 1,
    ecutwfc = 18.0
 /
 &electrons
    mixing_beta = 0.7
    conv_thr =  1.0d-8
 /
ATOMIC_SPECIES
 Si  28.086  Si.pbe-van_gipaw.upf

ATOMIC_POSITIONS
 Si 0.00 0.00 0.00
 Si 0.25 0.25 0.25

K_POINTS
  10
   0.1250000  0.1250000  0.1250000   1.00
   0.1250000  0.1250000  0.3750000   3.00
   0.1250000  0.1250000  0.6250000   3.00
   0.1250000  0.1250000  0.8750000   3.00
   0.1250000  0.3750000  0.3750000   3.00
   0.1250000  0.3750000  0.6250000   6.00
   0.1250000  0.3750000  0.8750000   6.00
   0.1250000  0.6250000  0.6250000   3.00
   0.3750000  0.3750000  0.3750000   1.00
   0.3750000  0.3750000  0.6250000   3.00