Re: the previous Email about various single crystal structure 
packages that could be applied to extracted intensities from
powder data - the following could be of interest:

On the principle of look before you try, there are some
graphical run-throughs for Ton Spek's Platon software at
the following web-page:
     http://www.ccp14.ac.uk/tutorial/platon/

Platon runs under Windows and UNIX.  The UNIX version
of Platon also has "System S" which is a wrapper and complete
structure solution toolkit around Shelx, Crunch, Dirdif and
Sir structure solution and refinement software.

The subset of Platon functionality described in the runthroughs are:

  -> Using Platon's Addsym to find missing Symmetry and possibly
     correctly assign the spacegroup based on the atom positions

 Refer to the following webpage on why the above could be considered
 a crystallographic must have tool:
    PLATON/ADDSYM analysis of all 1970 Cc structures in the CSD (apr 1999).
      http://www.cryst.chem.uu.nl/platon/cc.mis
      http://www.ccp14.ac.uk/ccp/web-mirrors/platon-spek/platon/cc.mis
      http://ccp14.sims.nrc.ca/ccp/web-mirrors/platon-spek/platon/cc.mis

  -> Using Platon to generate a CSD Quest query for checking if a
     structure has already been published; and looking into related
     structures.

  -> Quickly evaluating Atom Environments, Atom Distances, Atom Angles
     Using Platon

  -> Generating Fobs and Fdif Fourier Electron Density Contour Maps

  -> Using Platon to graphically loop through all Newman Projections in
     the structure

=======

Platon Homepage:
  http://www.cryst.chem.uu.nl/platon/
CCP14 Mirrors:
  http://www.ccp14.ac.uk//ccp/web-mirrors/platon-spek/platon/
  
ftp://ftp.minerals.csiro.au/pub/xtallography/ccp14/ccp/web-mirrors/platon-spek/platon/index.html
  http://ccp14.sims.nrc.ca/ccp/web-mirrors/platon-spek/platon/index.html

Platon FTP Download site:
  ftp://xraysoft.chem.uu.nl/pub/
CCP14 Mirrors:
  http://www.ccp14.ac.uk/ccp/ccp14/ftp-mirror/platon-spek/pub/
  
ftp://ftp.minerals.csiro.au/pub/xtallography/ccp14/ccp/ccp14/ftp-mirror/platon-spek/pub/
  http://ccp14.sims.nrc.ca/ccp/ccp14/ftp-mirror/platon-spek/pub/

------

Lachlan.


-- 
Lachlan M. D. Cranswick

Collaborative Computational Project No 14 (CCP14)
    for Single Crystal and Powder Diffraction
Daresbury Laboratory, Warrington, WA4 4AD U.K
Tel: +44-1925-603703  Fax: +44-1925-603124
E-mail: [EMAIL PROTECTED]  Ext: 3703  Room C14
                           http://www.ccp14.ac.uk

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