 &control
    calculation = 'scf'
    restart_mode='from_scratch',
    prefix='pbe0_54',
    tstress = .true.
    tprnfor = .true.
    pseudo_dir='/home/delta/workdir/qe/pseudo'
    outdir = '/home/delta/workdir/qe/outdir',
    disk_io='high',
 /
 &system    
    ibrav=  2, celldm(1) =24.67, nat=  54, ntyp= 2,
    ecutwfc = 60.0, nbnd = 160,
    input_dft='pbe0', nqx1 = 1, nqx2 = 1, nqx3 = 1,
 /
 &electrons
    diagonalization=cg,
    electron_maxstep=300,
    mixing_mode = 'plain',
    mixing_beta = 0.7,
    conv_thr =  1.0d-8
 /
ATOMIC_SPECIES
 C   12.01  C.pz-vbc.UPF
 Si  28.086  Si.pz-vbc.UPF
ATOMIC_POSITIONS angstrom
C        0.002180276  -0.002639221  -0.002639221
Si       1.094092673   1.089634796   1.089634796
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
C       -8.734284412   8.733328813   8.733328813
Si      -7.642377768   9.825603331   9.825603331
K_POINTS crystal_b
 5
0.0 0.0 0.0      20   # G
0.5 0.5 0.0      20   # X
0.5 0.75 0.25    20   # W
0.375 0.375 0.75 20   # K
0.5 0.5 0.5      20   # L
