> What interest for Rietveld users ? RMC is currently being adapted
> for structure determination from powder diffraction data (but this
> software version is apparently not yet available). Also those guys
> 
> Armel
> 
> 
 
Are we talking about a RMC program for powder XRD data here? That would 
be very interesting. There is a list of RMC programs at
         http://www.studsvik.uu.se/rmc/rmchome.htm 
One of them is RMCPOW, "Structural refinement of crystalline materials
based on powder diffraction data, including modelling of diffuse 
scattering". This seems really enticing, but I can't find the program on the 
referred ftp server. I am not sure if it is the same program you talked 
about.
Does Armel mean for the time being there is no free circulating RMC program 
for the powder data, although someone is working on it? I wonder if 
there is even a free-to-check-out program using powder data for the
analysis of (really) disordered structure, no matter which approach is 
adopted. I would really like to see one.
Some day we will be able to run a powder sample on a super powder diffractometer,
feed the data into a super computer (or just a X86), and after a couple of 
minutes, Bingo! Everything will show up on a 20'' ultra high resolution 
computer screen, everything you want to know about its structure. I 
wounder if people on board of Voyager do that as a daily routine.
Just a little fun for the Friday afternoon. Everybody has a good 
weekend!  
Tao
1/31/96