&control
 calculation = 'scf'
 prefix='diamond',
 tstress = .true.
 tprnfor = .true.
 pseudo_dir = './',
 outdir='./work/'
 disk_io='low'
 wf_collect=.true.
/
&system
 ibrav = 2,
 celldm(1) = 6.66,
 nat = 2,
 ntyp = 1,
 ecutwfc = 30.0,
 ecutrho = 150.0,
 occupations = 'smearing'
 smearing = 'm-p'
 degauss = 0.01
/
&electrons
 mixing_beta = 0.7
 conv_thr = 1.0d-8
/
ATOMIC_SPECIES
C  12.0107  C.pz-van_ak.UPF
ATOMIC_POSITIONS {crystal}
C 0.00 0.00 0.00
C 0.25 0.25 0.25
K_POINTS {automatic}
8 8 8 0 0 0