In order to visualize charge density  fluctuations 
 the external single ion module has to provide the transition
matrix elements of the chargedensity coefficient operator 
 by a
vector 
, which is given by:
 
. 
The format to be used is:
extern "C" int dchargedensity_ceoff1(int & tn,double & T,Vector & Hxc,Vector & Hext,double * g_J,Vector & MODPAR, char ** sipffilename,ComplexVector & cd1,float & maxE, ComplexMatrix & est)The meaning of the symbols follows exactly that of function dm1 and therefore not explained here.