Artículo
Effect of the crystal chemistry on the hydration mechanism of swelling micas
Autor/es | Pavón González, Esperanza
Alba Carranza, María Dolores Castro Arroyo, Miguel Ángel Osuna, Francisco J. Pazos, M. Carolina |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2017 |
Fecha de depósito | 2023-03-13 |
Publicado en |
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Resumen | Swelling and dehydration under minor changes in temperature and water vapor pressure is an important property that clays and clay minerals exhibit. In particular, their interlayer space, the solid-water interface and the ... Swelling and dehydration under minor changes in temperature and water vapor pressure is an important property that clays and clay minerals exhibit. In particular, their interlayer space, the solid-water interface and the layers’ collapse and re-expansion have received much attention because it affects to the dynamical properties of interlayer cations and thus the transfer and fate of water and pollutants. In this contribution, the dehydration and rehydration mechanism of a swelling high-charge mica family is examined by in situ X-ray Diffraction. The effect of the aluminosilicate layer charge and the physicochemical properties of the interlayer cations on these processes are analyzed. The results showed that the dehydration temperature and the number of steps involved in this process are related to the layer charge of the silicate and the physicochemical properties of the interlayer cations. Moreover, the ability to adsorb water molecules in a confined space with high electric field by the interlayer cations does not only depend on their hydration enthalpy but also on the electrostatic parameters of these cations. |
Agencias financiadoras | Junta de Andalucía Ministerio de Economía y Competitividad (MINECO). España European Union (UE) |
Identificador del proyecto | P12-FQM-567
MAT2015-63929-R 291780 |
Cita | Pavón González, E., Alba Carranza, M.D., Castro Arroyo, M.Á., Osuna, F.J. y Pazos, M.C. (2017). Effect of the crystal chemistry on the hydration mechanism of swelling micas. Geochimica et Cosmochimica Acta, 217, 231-239. https://doi.org/10.1016/j.gca.2017.08.028. |
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