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Type: Journal article
Title: Quantitative cathodoluminescence mapping with application to a Kalgoorlie scheelite
Author: MacRae, C.
Wilson, N.
Brugger, J.
Citation: Microscopy and Microanalysis, 2009; 15(3):222-230
Publisher: Springer-Verlag
Issue Date: 2009
ISSN: 1431-9276
Statement of
Colin M. MacRaea, Nicholas C. Wilsona and Joel Brugger
Abstract: A method for the analysis of cathodoluminescence spectra is described that enables quantitative trace-element-level distributions to be mapped within minerals and materials. Cathodoluminescence intensities for a number of rare earth elements are determined by Gaussian peak fitting, and these intensities show positive correlation with independently measured concentrations down to parts per million levels. The ability to quantify cathodoluminescence spectra provides a powerful tool to determine both trace element abundances and charge state, while major elemental levels can be determined using more traditional X-ray spectrometry. To illustrate the approach, a scheelite from Kalgoorlie, Western Australia, is hyperspectrally mapped and the cathodoluminescence is calibrated against microanalyses collected using a laser ablation inductively coupled plasma mass spectrometer. Trace element maps show micron scale zoning for the rare earth elements Sm3+, Dy3+, Er3+, and Eu3+/Eu2+. The distribution of Eu2+/Eu3+ suggests that both valences of Eu have been preserved in the scheelite since its crystallization 1.63 billion years ago.
Description: Copyright © Microscopy Society of America 2009
DOI: 10.1017/S1431927609090308
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Appears in Collections:Aurora harvest
Earth and Environmental Sciences publications

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