 &control
    calculation = 'scf',
    restart_mode = 'from_scratch',
    title = 'sio2',
    prefix = 'sio2',
    outdir = './temp/',
    pseudo_dir = './',
    tprnfor = .true.,
    tstress = .true.,
    etot_conv_thr = 1.0D-4,
    forc_conv_thr = 1.0D-4
 /

 &system
    ibrav = 0,
    celldm(1) = 7.040607,
    nat =  6, 
    ntyp = 2,
    ecutwfc = 80,
    ecutrho = 1000
 /

 &electrons
    mixing_beta = 0.4,
    conv_thr = 1.0D-8
 /
 
 &ions
 /
 
 &cell
 /

ATOMIC_SPECIES
 Si 28.086  Si.pbe-n-rrkjus_psl.0.1.UPF
 O 15.999 O.pbe-n-rrkjus_psl.0.1.UPF

CELL_PARAMETERS (alat)
  0 1 1
  1 0 1
  1 1 0

ATOMIC_POSITIONS (crystal)
Si       0.125 0.125 0.125
Si       -0.125 -0.125 -0.125
O 0 0 0
O 0.5 0 0
O 0 0.5 0
O 0 0 0.5

K_POINTS (automatic)
  8 8 8 0 0 0
