Determining the water content of nominally anhydrous minerals at the nanometre scale

The amount and distribution of water in nominally anhydrous minerals (NAMs) are usually determined by Fourier-transform infrared spectroscopy. This method is limited by the spot size of the beam to the study of samples with dimensions greater than a few micrometers. Here, we demonstrate the potentia...

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Bibliographic Details
Published in:Review of scientific instruments 2021-02, Vol.92 (2), p.023103-023103
Main Authors: Patabendigedara, Sarath, Nowak, Derek, Nancarrow, Mitchell J. B., Clark, Simon Martin
Format: Article
Language:English
Subjects:
Forsterite
Fourier transforms
Grain boundaries
Heterogeneity
Micrometers
Minerals
Moisture content
Scientific apparatus & instruments
Speciation
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Summary:The amount and distribution of water in nominally anhydrous minerals (NAMs) are usually determined by Fourier-transform infrared spectroscopy. This method is limited by the spot size of the beam to the study of samples with dimensions greater than a few micrometers. Here, we demonstrate the potential of using photoinduced force microscopy for the measurement of water in NAMs with samples sizes down to the nanometer scale with a study of water concentration across grain boundaries in forsterite. This development will enable the study of water speciation and diffusion in small-grained rock matrixes and allow a determination of the influence of nanoscale heterogeneity on the incorporation of water to NAMs.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0025570