We are using SRM1976 for energy calibration at our powder diffraction
beamline. Usually we care only about the peak positions, but at one time I
collected a dataset appropriate for Rietveld refinement. I found that
intensities were inconsistent with Al2O3, and discrepancies would be
consistent with a severe degree preferred orientation of the crystallites.
Including a simple M-D type preferred oriention correction I was able to
obtain a reasonable fit to the data. Perhaps your Al2O3 plate has strongly
aligned crystallites, too.
goodluck
Apurva
>
>__________________________________________
>Dana Thomas Griffen <dana_griffen@byu.edu>
>Department of Geology
>Brigham Young University
>Provo, UT 84602
>Phone: 801-378-2305
>Fax : 801-378-8143
>
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Apurva Mehta
SSRL/SLAC
PO Box 4349, MS 69
Stanford, CA 94309
(415) 926 4791
(415) 926 4100 - FAX
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