&control
    calculation = 'scf'
    restart_mode='from_scratch',
    prefix='Na6Si34',
    pseudo_dir = '/home/gryko/Psps/'
    outdir='tmp'
 /
 &system    
    ibrav = 0,
    celldm(1) = 27.6278,
    nat = 40,
    ntyp = 2,
    ecutwfc = 30,
 /
 &electrons
    mixing_beta = 0.7 
    conv_thr =  1.0d-8
 /
ATOMIC_SPECIES
 Na    23.00
 Si    28.08 
  
CELL_PARAMETERS
    0.0  0.5  0.5
    0.5  0.0  0.5
    0.5  0.5  0.0
ATOMIC_POSITIONS
Na  0 0 0
Na  0.375 0.375 0.375
Na  0 0.5 0
Na  0 0 0.5
Na  0.625 0.625 0.625
Na  0.5 0 0
Si  0.125 0.125 0.125
Si  0.781 0.781 0.781
Si  0.781 0.781 0.157
Si  0.629 0.629 0.005
Si  0.629 0.629 0.237
Si  0.995 0.763 0.371
Si  0.875 0.875 0.875
Si  0.219 0.219 0.219
Si  0.157 0.781 0.781
Si  0.781 0.157 0.781
Si  0.219 0.219 0.843
Si  0.219 0.843 0.219
Si  0.843 0.219 0.219
Si  0.005 0.629 0.629
Si  0.629 0.005 0.629
Si  0.371 0.371 0.995
Si  0.371 0.995 0.371
Si  0.995 0.371 0.371
Si  0.237 0.629 0.629
Si  0.629 0.237 0.629
Si  0.371 0.371 0.763
Si  0.371 0.763 0.371
Si  0.763 0.371 0.371
Si  0.371 0.995 0.763
Si  0.763 0.371 0.995
Si  0.237 0.005 0.629
Si  0.005 0.629 0.237
Si  0.629 0.237 0.005
Si  0.005 0.237 0.629
Si  0.629 0.005 0.237
Si  0.237 0.629 0.005
Si  0.763 0.995 0.371
Si  0.995 0.371 0.763
Si  0.371 0.763 0.995
K_POINTS AUTOMATIC 2 2 2