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Spectroscopic investigation and theoretical modeling of kaolinite-group minerals and other low-temperature phases

Abstract : This article summarizes some recent results obtained on the physical properties of environmental minerals, mostly kaolinite-group minerals and Fe- and Al-(hydr)oxides occurring in lateritic soils. The defective structure of these minerals, including impurities, stacking faults and radiation-induced defects, is probed using infrared spectroscopy and electron paramagnetic resonance. Resulting information bears on models of soil formation and transformation mechanisms of minerals in low-temperature environments. We underline the increasing impact of quantum chemical modeling in this field, providing straightforward interpretations of spectroscopic signals and overcoming the limits of fingerprint approaches. Importantly, the first-principles modeling of isotopic fractionation factors provides new links between mineralogical and geochemical investigations of secondary minerals.
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Submitted on : Friday, March 11, 2022 - 6:13:33 PM
Last modification on : Monday, March 28, 2022 - 9:38:49 AM

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Etienne Balan, Emmanuel Fritsch, Thierry Allard, Guillaume Morin, Maxime Guillaumet, et al.. Spectroscopic investigation and theoretical modeling of kaolinite-group minerals and other low-temperature phases. Comptes Rendus Géoscience, Elsevier, 2011, 343, pp.177-187. ⟨10.1016/j.crte.2010.10.006⟩. ⟨insu-03606500⟩

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