Raman spectroscopy of adsorbed water in clays: first attempt of band assignment

Dominique de Ligny (1) , Emmanuel Guillaud (1) , Hélène Gailhanou (2) , Philippe Blanc (2)

1 ILM - Institut Lumière Matière [Villeurbanne]
2 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

The following assignment is proposed for the OH region of SAz-2. The two large band at 3260 and 3475 cm-1 are assigned to water in pores, 3620 cm-1 to water molecules around the interlayer cations and 3650cm-1 to hydroxyl group within the clay layer. The band at 3600 cm-1 is therefore more likely to be connected to adsorbed water on the clay surface. It was also shown that Raman spectroscopy could be a useful tool to determine water content inside clays or even inside highly saturated solution.

Keywords: smectite; adsorbed water; Raman spectroscopy; "

Domains: Sciences of the Universe [physics]; Earth Sciences; Mineralogy; Chemical Sciences; Analytical chemistry

Dominique de Ligny, Emmanuel Guillaud, Hélène Gailhanou, Philippe Blanc. Raman spectroscopy of adsorbed water in clays: first attempt of band assignment. Procedia Earth and Planetary Science, 2013, Proceedings of the Fourteenth International Symposium on Water-Rock Interaction, WRI 14, 7, pp.203-206. ⟨10.1016/j.proeps.2013.03.202⟩. ⟨hal-00838526⟩