title: Ion hydration under pressure.
abstract: The pressure dependence of the radial distribution of water oxygen atoms around Rb+ and Br- ions in a diluted RbBr aqueous solution has been investigated by means of x-ray absorption spectroscopy at the Br and Rb K edges up to 2.8 GPa, using a large-volume high-pressure setup developed at a third generation synchrotron radiation facility. Dramatic effects in the anion hydration structure, in particular, are observed, indicating that upon increasing pressure water undergoes a structural transformation which involves considerable molecular reorientation.
authors: Dipartimento di Fisica, Università degli Studi dell'Aquila, and Istituto Nazionale per la Fisica della Materia, Unità di Ricerca L'Aquila, Italy.
authors: Adriano
authors: A
authors: Filipponi
authors: Simone
authors: S
authors: De Panfilis
authors: Cecilia
authors: C
authors: Oliva
authors: Maria Antonietta
authors: MA
authors: Ricci
authors: Paola
authors: P
authors: D'Angelo
authors: Daniel T
authors: DT
authors: Bowron