>	I am working in powder diffraction and I have just done 
>	a neutron experiment. I use FULLPROF and DBWS programs
>	for profile refinement and I need a program to do Fourier
>	Syntheses from neutron data. 
>	Would someone tell me how obtain it ?
  FULLPROF has an output for "|Fobs|" which can be used as
input for SHELXL93 available from George Sheldrick. Neutrons
Fermi lengths are represented by the constant term in the 
parametrized formula of X-ray diffusion factors. Negative peaks
may be asked for the Fourier syntheses.
  See http://www.unige.ch/crystal/crystal_index.html for how
to obtain it.
          Armel Le Bail  -   armel@ONE.univ-lemans.fr