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# DQ

From Vaspwiki

**DQ** = [real]

Default: **DQ** = 0.001

Description: step size for the finite difference *k*-space derivative in the linear response calculation of chemical shifts.

Typical values for **DQ** are in the range [0.001 - 0.003]. The default is often sufficient.

## Related Tags and Sections

LCHIMAG, ICHIBARE, LNMR_SYM_RED, NLSPLINE