introduction and a question (instrument file)

STEPHAN JANSEN ( tgtvsj@chem.tue.nl )
Wed, 12 Feb 1997 09:39:15 +0000

Hello to all Rietveld Users,

my name is Stephan Jansen, and I am working as a Ph.D. student at the
Laboratory of Solid State Chemistry and Materials Science at the
Eindhoven University of Technology. My work concerns the preparation,
characterisation, and properties of new aluminium oxynitrides with the
beta alumina or magnetoplumbite structure.
Last year some neutron diffraction experiments were performed (at ISIS)
on several barium beta aluminas. So since that time I am (slowly) gaining
some experience with the Rietveld method and with the GSAS program.
Because I want to have additional data sets I want to to perform
XRD-measurements (Cu Ka on a Rigaku apparatus) of these materials.
Well this is the point where I get to my question.
Together with the raw data set an instrument file is needed. How do I
create such a file (in GSAS), what parameters have to be in it, and how
do I obtain these parameters for this file (like profile functions etc.). There
are some instrument files within the example section of GSAS
(pc-version) but a lot of constants are mentioned which are not
described in the manual, making it altogether quite complicated for an
inexperienced user.

Thanks in advance for helping me.

Stephan Jansen

Ir. S.R. Jansen
Center for Technical Ceramics
Laboratory of Solid State Chemistry and Materials Science
Eindhoven University of Technology
5600 MB Eindhoven, The Netherlands
telephone: + 31 40 247 3132
telefax: + 31 40 244 5619
e-mail: tgtvsj@chem.tue.nl