title: Confined H2O molecules as local probes of pressure-induced amorphisation in faujasite.
abstract: Confined H2O molecules act as local probes for depressurization phenomena during the pressure induced amorphisation of faujasite NaX at which the OH stretching frequency first decreases and then increases almost to its room pressure value upon further compression. Pair distribution function (PDF) analysis provides evidence that amorphisation corresponds to a collapse of the structure around hydrated sodium cations with strong distortion of the secondary building units (double six-membered rings, sodalite cages). Both the use of guest molecules as local probes in far- and mid-infrared spectroscopy, where we correlate intermolecular water H bonding vibrations and internal mode behaviour under confinement, and PDF analysis could be of great use to study the mechanical behaviour of other hydrated materials.
authors.affiliation: Institut Charles Gerhardt Montpellier, UMR 5253 CNRS, Université Montpellier 2, 34095 Montpellier Cedex 5, France. julien.haines@univ-montp2.fr.
authors.forename: Jadna
authors.initials: J
authors.lastname: Catafesta
authors.forename: Frederico
authors.initials: F
authors.lastname: Alabarse
authors.forename: Claire
authors.initials: C
authors.lastname: Levelut
authors.forename: Aude
authors.initials: A
authors.lastname: Isambert
authors.forename: Philippe
authors.initials: P
authors.lastname: Hébert
authors.forename: Shinji
authors.initials: S
authors.lastname: Kohara
authors.forename: David
authors.initials: D
authors.lastname: Maurin
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Bantignies
authors.forename: Olivier
authors.initials: O
authors.lastname: Cambon
authors.forename: Gaëlle
authors.initials: G
authors.lastname: Creff
authors.forename: Pascale
authors.initials: P
authors.lastname: Roy
authors.forename: Jean-Blaise
authors.initials: JB
authors.lastname: Brubach
authors.forename: Tahar
authors.initials: T
authors.lastname: Hammouda
authors.forename: Denis
authors.initials: D
authors.lastname: Andrault
authors.forename: Julien
authors.initials: J
authors.lastname: Haines