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Analysis of the CuKβX-Ray Diffraction Pattern of YAG (Yttrium Aluminium Garnet) by Numerical and Computerized Graphics Techniques

Published online by Cambridge University Press:  10 January 2013

G. Berti  and
P. Palamidese
G. Berti
Affiliation:
Dipartimento di Scienze della Terra -Universita' di Pisa- Via S. Maria 53, 56100 - Pisa, Italy
P. Palamidese
Affiliation:
Dipartimento di Scienze della Terra -Universita' di Pisa- Via S. Maria 53, 56100 - Pisa, Italy
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Abstract

Yttrium aluminium garnet, Y3A15O12– YAG, has a powder diffraction pattern that is easy to analyse in principle, but shows very interesting problems. These problems are revealed using an interactive graphics system, UNIRAS, intregated with some of the usual procedures for crystallographic data processing. For example, indexing with the APPLEMAN procedure is improved when the high-angle peaks are properly identified, and the cell parameters then refine to a high precision. Iterations between refinements and graphical analysis allows the operator to identify even some of the very weak peaks in the pattern. Using the peak positions from the refinement, the experimental data can be analyzed for instrumental aberrations and corrections can be applied to improve the accuracy of the cell parameter.

Type
Research Article
Information
Powder Diffraction , Volume 5 , Issue 4 , December 1990 , pp. 186 - 191
Copyright
Copyright © Cambridge University Press 1990

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