SYSTEM = ION_CSP
NPAR = 4
PREC = Accurate 
ENCUT = 800
EDIFF = 1e-4  # 1e-6
IBRION = -1
ISMEAR = 0 ; SIGMA = 0.05
#No writing charge density and wavefunction 
LCHARG = FALSE 
LWAVE = FALSE 
#Target Pressure 
#PSTRESS = 100 
#Finer optimization 
EDIFFG = -0.05  # 1e-4
KSPACING = 0.25 
IVDW = 11
