11.2.9 grid_obtain_gradwt: obtain a block of grid weight derivatives

      subroutine grid_obtain_gradwt(icatom,npt,xyz,wt,jwt,dwt)
      implicit double precision (a-h,o-z)
      include "common/cgeom"
      dimension xyz(3,ncen), wt(npt),dwt(3,ncen,npt)

Obtain a block of weight derivatives.

iatom

atom identifier -- must be supplied on input.

npt

number of grid points in block -- must be supplied on input.

xyz

cartesian coordinates of the grid points -- must be supplied on input.

wt

integration weights -- must be supplied on input.

jwt

on entry, the type of weight.

dwt

on exit, the weight derivatives with respect to nuclear motion.