NGX

NGX = [integer]
Default: NGX = set in accordance with PREC and ENCUT 

Description: NGX sets the number of grid points in the FFT-grid along the first lattice vector.

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By default NGX is set in accordance with the requested "precision"-mode (PREC) and the plane wave kinetic energy cutoff ENCUT:

PREC	NGX
Normal	3/2×$G_{\rm {cut}}$
Single	3/2×$G_{\rm {cut}}$
Accurate	2×$G_{\rm {cut}}$
Low	3/2×$G_{\rm {cut}}$
Medium	3/2×$G_{\rm {cut}}$
High	2×$G_{\rm {cut}}$

where

$E_{\rm {cut}}={\frac {\hbar ^{2}}{2m_{e}}}G_{\rm {cut}}^{2}$

with E_cut=ENCUT.

Alternatively, set NGX to a specific value in the INCAR file.

Related tags and articles

NGY, NGZ, NGXF, NGYF, NGZF, PREC, ENCUT, ENAUG, ENMAX

Examples that use this tag

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