Alan,

        We too have searched for the capability to show tow structures
simultaneously, and I would assume many others as well.  Would you please
post a short description of your method?

        Thanks, AlexY

Dr. Alexandre F. T. Yokochi
Assistant Professor (Senior Research)
Director, X-ray Crystallographic Facilities
Department of Chemistry
Oregon State University
Corvallis, OR 97331-4003

Ph#  (541) 737-6724     Email: [EMAIL PROTECTED]
Fax# (541) 737-2062     Web Page: crystal.chem.orst.edu/~alexy (temporarily
unavailable)


        -----Original Message-----
        From:   Alan Hewat [SMTP:[EMAIL PROTECTED]]
        Sent:   Monday, January 17, 2000 6:10 AM
        To:     RIETVELD_L Distribution List
        Subject:        Re: Needed - a SW to show overlapping structures 

        At 14:24 17/01/2000 +0100, you wrote:
        >we are looking for a SW (non-commercial, pls) which can show two
        >independent structures in one picture. 

        One way of doing this is to flip between two 3D-drawings of the
structures 
        at an interval of ~1 sec.  We have used this to study phase
transitions.

        We do it by producing VRML files for the two structures (using
xtal-3d on
        http://barns.ill.fr/dif/xtal-3d.html ) and then on an SGI computer
viewing
        a simple Iris Inventor file that flips rapidly between the two 3D
drawings.

        If you have an SGI machine I can tell you the details, but if you
don't
        this probably won't help much :-)  But a similar kind of thing
should be 
        possible with other software and hardware (eg using VRML-2 under
Windows).

        Alan.

        Alan Hewat, ILL Grenoble, FRANCE <[EMAIL PROTECTED]> tel (33)
4.76.20.72.13 
        ftp://ftp.ill.fr/pub/dif  fax (33) 4.76.20.76.48
http://www.ill.fr/dif/

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