Abstract
EXAFS Rayleigh wing and Raman-scattering data in SbCl3/H2O mixture are presented. The measurements, carried out at the PULS facility on the ClK-edge and on theLI, II, III-edges as a function of temperature, allow us to define the local order around the absorber. In particular, clear evidence exists that intramolecular Sb−Cl and intermolecular Sb...Cl distances and coordination, similar to the ones existing in pure SbCl3, are present. The data analysis reveals also that the water molecules are linked to the chlorine, giving rise to a cross-link between the antimony trichloride chains. The light scattering response confirms these structural hypotheses, indicating that the primitiveC3v symmetry of the SbCl3 molecule is lowered by the water presence. Evidence also exists that new vibrational bands are originated by the chlorine-water bonds. Finally we detected a phononlike contribution, in the low-frequency region, that gives an effective Raman vibrational density of states.
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