character(len=10) :: basis_precision

This specifies the precision of the basis set by choosing the level of convergence of atomic energies with respect to the plane wave cut off energy for the pseudopotentials used in the calculation.

Options for BASIS_PRECISION are

-

COARSE - 1 eV per atom

-

MEDIUM - 0.3 eV per atom

-

FINE - 0.1 eV per atom

-

PRECISE - $1.2\times$FINE

-

EXTREME - 0.01 eV per atom.

The default value for this parameter is `FINE'.

If CUT_OFF_ENERGY is specified in the parameter file, this parameter will be set to `NULL'.