&control
    calculation = 'scf',
    restart_mode='from_scratch',
    prefix='ch4',
    tprnfor = .true.,
    pseudo_dir = './',
 /
 &system
    ibrav=  1,
    celldm(1) =15.0,
    nat=5,
    ntyp= 2,
    ecutwfc =40.0,
    nbnd=5
 /
 &electrons
    diagonalization='cg'
    mixing_beta = 0.5,
    conv_thr =  1.0d-8
 /
ATOMIC_SPECIES
 H  1.0   H.pz-vbc.UPF
 C  12.0  C.pz-vbc.UPF
ATOMIC_POSITIONS {bohr}
H        1.198204546   1.198204546   1.198204546
H       -1.198204546  -1.198204546   1.198204546
H        1.198204546  -1.198204546  -1.198204546
H       -1.198204546   1.198204546  -1.198204546
C        0.000000000   0.000000000   0.000000000