At 12:02 PM 11/19/97 -0800, you wrote:
>Hi,
>We have recently purchased a Scintag X1 Powder Diffractometer. I would
>like start doing Rietveld analysis. May I know know what's the best
>standard to use? Also, I would like to be able to use GSAS to refine the
>data. Any suggestions would be helpful.. i.e. how to obtain an
>instrument parameter file...
>Thanks in advance.
>Julia Chan
>
For our older Scintag with Soller slits, A starting parameter file, which
includes the axial divergence asymmetry, is:
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INS BANK 1
INS DTYPE STND
INS HTYPE PXCR
INS 1 IRAD 3
INS 1 ICONS 1.540500 1.544300 0.0 0 0.5 0
INS 1I HEAD INCIDENT SPECTRUM FOR SCINTAG X-RAY DIFFRACTOMETER
INS 1I ITYP 0 0.0000 180.0000 1
INS 1PRCF 3 19 .01000 0NNNNNNNNNNNNNNNNNNNNNNNN
INS 1PRCF 1 .000000E+00 .000000E+00 .530483E+01 .000000E+00
INS 1PRCF 2 .351248E+00 .743783E+01 .123205E-01 .140000E-01
INS 1PRCF 3 .000000E+00 .000000E+00 .000000E+00 .000000E+00
INS 1PRCF 4 .000000E+00 .000000E+00 .000000E+00 .000000E+00
INS 1PRCF 5 .000000E+00 .000000E+00 .000000E+00
INS 1PREFO1 1.000000 1.000000 .000000 .000000 1.000000 NN 0 0
Larry
--Larry W. Finger finger@gl.ciw.eduGeophysical Laboratory Phone: +1 (202) 686-2410 X 24645251 Broad Branch Road N.W. FAX: +1 (202) 686-2419Washington, DC 20015-1305 Web: http://granite.ciw.edu/~finger/USA orhttp://btgix8.bgi.uni-bayreuth.de/~lafi