 &control
    calculation='scf',
    restart_mode='from_scratch',
    prefix='Si',
    pseudo_dir='./'    
 /
 &system
    ibrav = 0, 
    celldm(1) =10.2612, 
    nat=  2, 
    ntyp= 1,
    ecutwfc = 24.0
 /
 &electrons
    diagonalization='cg'
    mixing_beta = 0.7
    conv_thr =  1.0d-10
 /
ATOMIC_SPECIES
 Si  28.086  Si.pz-vbc.UPF
CELL_PARAMETERS {cubic}
 0 0.5 0.5
 0.5 0 0.5
 0.5 0.5 0
ATOMIC_POSITIONS {crystal}
 Si 0.00 0.00 0.00
 Si 0.25 0.25 0.25
K_POINTS AUTOMATIC
5 5 5 1 1 1
