&CONTROL
   calculation = "vc-relax"
 /
 &SYSTEM
   ibrav = 14,
   A = 3.70971016 ,
   B = 3.70971016 ,
   C = 3.70971016 ,
   cosAB = 0.49517470 ,
   cosAC = 0.49517470 ,
   cosBC = 0.49517470 ,
                         nat  =  2 , 
                        ntyp  =  1 , 
                     ecutwfc  =  25.0 ,
                        nbnd  =  9 , 
                 occupations  =  'smearing' ,
                    smearing  =  'mp' ,
                     degauss  =  0.005 
 /
 &ELECTRONS
                    conv_thr  =  1.0d-7 
 /
 &IONS
    ion_dynamics='bfgs'
 /
 &CELL
   cell_dynamics='bfgs'
   press = 0.0
 /
ATOMIC_SPECIES
   As   74.90000  As.pz-bhs.UPF
ATOMIC_POSITIONS crystal 
As    0.290010       0.290010       0.290010
As   -0.290010      -0.290010      -0.290010
K_POINTS automatic 
  4 4 4   1 1 1