&control
    calculation='vc-cp',
    restart_mode='reset_counters',
    nstep=100, iprint=10, isave=100,
    dt=12.0,
    ndr=92, ndw=93,
    prefix='sio2'
    verbosity='medium'
 /
 &system
    ibrav=8, celldm(1)=9.28990, celldm(2)=1.73206, celldm(3)=1.09955,
    nat=18, ntyp=2, nbnd=48, nspin=1,
    ecutwfc=20.0, ecutrho=150.0,
    nr1b=24, nr2b=24, nr3b=24,
    qcutz=150., q2sigma=2.0, ecfixed=16.0,
 /
 &electrons
    electron_dynamics='verlet', ortho_max=30,
    emass=700., emass_cutoff=3.,
 /
 &ions
    ion_dynamics='verlet', ion_temperature='nose',
    tempw=300, fnosep=6.6666,
    ion_radius(1)=1.0, ion_radius(2)=1.0,
 /
 &cell
    cell_dynamics='pr', cell_temperature='nose',
    temph=300., fnoseh=8.6071, press=1.0,
 /
ATOMIC_SPECIES
   O  16.00 O.pz-rrkjus.UPF
  Si  28.00 Si.pz-vbc.UPF
ATOMIC_POSITIONS
 O  3.18829368  14.83237039   1.22882961
 O  7.83231469   6.78704039   1.22882961
 O  2.07443467   5.99537992   4.73758250
 O  6.72031366  14.04231898   4.73758250
 O  3.96307134  11.26989826   7.87860582
 O  8.60802134   3.22295920   7.87860582
 O  3.96307134   4.81915267   9.14625133
 O  8.60802134  12.86448267   9.14625133
 O  3.18736469   1.25668055   5.58029607
 O  7.83324368   9.30201055   5.58029607
 O  2.07536366  10.09206195   2.07358613
 O  6.71938467   2.04673195   2.07358613
Si  0.28891589   8.04533000   3.40456284
Si  4.93386589   0.00000000   3.40456284
Si  2.13389003  12.27717358  -0.04188031
Si  6.77884003   4.23184358  -0.04188031
Si  2.13389003   3.81348642   6.85202747
Si  6.77884003  11.85881642   6.85202747