 &control
    calculation = 'vc-relax',
    verbosity = 'high'
    prefix = 'Al_vc-relax'
    outdir = './tmp/'
    pseudo_dir = '../pseudo/'
    tprnfor = .true.
    tstress = .true.
 /
 &system
    ibrav =  0, 
    celldm(1) = 7.65, 
    nat =  4, 
    ntyp = 1,
    ecutwfc = 30.0,
    occupations = 'smearing',
    smearing = 'marzari-vanderbilt',
    degauss = 0.02
 /
 &electrons
    mixing_beta = 0.7
 /
 &ions
 /
 &cell
 /
ATOMIC_SPECIES
 Al 26.98  Al.pz-vbc.UPF

ATOMIC_POSITIONS (alat)
 Al 0.0 0.0 0.0
 Al 0.5 0.5 0.0
 Al 0.5 0.0 0.5
 Al 0.0 0.5 0.5

K_POINTS (automatic)
  6 6 6 0 0 0
CELL_PARAMETERS
 1.0 0.0 0.0
 0.0 1.0 0.0
 0.0 0.0 1.0
