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Abstract Details

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

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

https://doi.org/10.46427/gold2020.483

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02d: Room 1, View in program

Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.

Submitted by Catherine McCammon on
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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