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Correlation between Charge Contrast Imaging and the Distribution of Some Trace Level Impurities in Gibbsite

  • Travis C. Baroni (a1), Brendan J. Griffin (a2), James R. Browne (a2) and Frank J. Lincoln (a1)

Abstract

Charge contrast images (CCI) of synthetic gibbsite obtained on an environmental scanning electron microscope gives information on the crystallization process. Furthermore, X-ray mapping of the same grains shows that impurities are localized during the initial stages of growth and that the resulting composition images have features similar to these observed in CCI. This suggests a possible correlation between impurity distributions and the emission detected during CCI. X-ray line profiles, simulating the spatial distribution of impurities derived from the Monte Carlo program CASINO, have been compared with experimental line profiles and give an estimate of the localization. The model suggests that a main impurity, Ca, is depleted from the solution within approximately 3–4 μm of growth.

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Department of Chemistry, The University of Western Australia, Nedlands, Perth, Western Australia 6097, Australia

Correlation between Charge Contrast Imaging and the Distribution of Some Trace Level Impurities in Gibbsite

  • Travis C. Baroni (a1), Brendan J. Griffin (a2), James R. Browne (a2) and Frank J. Lincoln (a1)

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