KSPACING-tag and KGAMMA-tag

KSPACING = [real]
KGAMMA = [logical]

Default:
KSPACING	=	0.5
KGAMMA	=	.TRUE.

The tag KSPACING determines the number of k-points if the KPOINTS file is not present (see Sec. 5.5). KSPACING is the smallest allowed spacing between k-points in units of Å$^{-1}$. The number of k-points increases when the spacing is decreased. The number of k-points in the direction of the first, second and third reciprocal lattice vector is determined by the equations

$${\rm max}(1, \vert {\vec b}(i)\vert / {\tt KSPACING} )$$

These values are rounded to the next integer. The generated grid is either centred at the $\Gamma$ point (e.g. includes the $\Gamma$ point) (KGAMMA=.TRUE.) or is shifted away from the $\Gamma$ point, as usually done for Monkhorst Pack grids (KGAMMA=.FALSE.) (compare Sec. 5.5.3). Per default, the grids include the $\Gamma$ point.