&CONTROL
          calculation =   "vc-relax"   ,
		restart_mode='restart',
                      prefix = 'carbon' ,
                   disk_io = 'minimal' ,
                   verbosity = 'low' ,
                       nstep = 100 ,
                    tstress = .true. ,
                     tprnfor = .true. ,
                     forc_conv_thr = 1.0D-4,
                     etot_conv_thr = 1.0D-5,
                      dt = 300 ,
                     pseudo_dir = '.',
 /
 &SYSTEM
    			ibrav=  2, 
			celldm(1) = 6.741020794,
			nat=  2, 
			ntyp= 1,
                      nosym = .false.,
		occupations = 'smearing',
			ecutwfc = 120,
			ecutrho = 720,
		degauss = 0.05,
/
 &ELECTRONS
                 startingpot = 'atomic' ,
                 startingwfc = 'atomic' ,
                electron_maxstep = 500,
 /
 &IONS
  ion_dynamics='bfgs'
 /
 &CELL
   cell_dynamics = 'bfgs' ,
   press = 0 ,
 /
ATOMIC_SPECIES
 C    12    C.pz-van_ak.UPF
!PSEUDO
ATOMIC_POSITIONS crystal
C 0 0 0
C 0.25 0.25 0.25
K_POINTS automatic 
 10 10 10 0 0 0
!K