general:
 System = BGG_disp
 LREAL = .False.
 ISTART = 0 ; ICHARG = 2
 ENCUT  =    320
 ISMEAR = 2; SIGMA = 0.2;
 EDIFF = 1.0E-9

 PREC = Accurate
 ADDGRID = .True.
 NPAR = 8
 LSCALAPACK = .False.
 LWAVE=.False.; LCHARG = .False.

