&control
    verbosity='high'
    calculation='scf'
    restart_mode='from_scratch'
    prefix='SI'
    pseudo_dir = './',
    outdir='./'
    wf_collect=.true.
 /
 &system
    ibrav=2
    celldm(1)=28.34590316661532908648
    nat=2,
    ntyp=1,
    ecutwfc = 30,
    occupations='smearing',
    degauss=0.001
 /
 &electrons
    conv_thr = 1.0e-8
    mixing_beta = 0.5
 /
 &ions
 /
ATOMIC_SPECIES
  Si  28.086  Si.pbe-mt_fhi.UPF
ATOMIC_POSITIONS  crystal
 Si 0.00 0.00 0.00
 Si 0.25 0.25 0.25
K_POINTS automatic
8 8 8 1 1 1