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(2020) Detection of H in Spinel-Structured Oxides via SCAPS Isotopography

Coulthard Jr. DA, Sakamoto N, Zellmer GF, Hamada M & Yurimoto H


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02d: Room 1, Wednesday 24th June 05:45 - 05:48

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Submitted by Catherine McCammon on Saturday 20th June 18:32
Can you detect hydrogen zoning in spinel grains using this method?
The short answer is that I think it is possible with meticulous signal analysis. Because H is certainly a trace element in spinel, one would need to process isotope/dimer images using our method. Then, the signal variance associated with multiple phases should be analyzed. If the signal variance associated with an area delineating a hypothetical spinel grain is significantly different than variance associated with a different phase (i.e. if the signal variation in a ratio image is heterogeneous), then the primary contribution of variance in one of those areas is something other than homogeneously distributed noise. In the case of H in spinel, I would interpret such a signal to indicate heterogeneity. Whether or not this heterogeneity is related to variation in H concentration or perhaps a structural aspect of the mineral grain would have to be determined independently. The 16OH image in our results section shows this effect nicely. -Danny

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