Light Scattering from Molten Salts: Structure and Dynamics

Octahedral fluoride glasses: Raman spectra and structure of niobium pentafluoride

“…No polarization measurements were conducted in the crystalline state due to its polycrystalline character. Following the methods described in [6] the VV and VH spectra were used for calculating the reduced Raman spectra R VV and R VH as well as the isotropic (ISO) and anisotropic (ANISO) representations.…”

“…The spectra show a set of polarized bands in the high frequency region 650-800 cm À1 and a set of depolarized bands in the $150-300 cm À1 re- gion. From the measured VV and VH spectra the reduced isotropic (ISO = VV À (4/3) VH) and anisotropic (ANISO = VH) representations [6] for all the amorphous phases have been calculated and shown in Fig. 6.…”

The Local Structure of Liquid TiCl4 Analyzed by X-Ray Diffraction and Raman Spectroscopy

“…For the analyses in reciprocal lattice space, the trials of Narten et al [12 -14] based on the Debye scattering equation as well as the algorithm proposed by Busing and Levy [15] are of great advantage and service. Another experimental technique is Raman spectroscopy [16,17], providing vibrational modes of chemical species in the melts such as complex ions, clustered species, and molecules.…”

Fluctuating ionic polarizabilities in the condensed phase: first-principles calculations of the Raman spectra of ionic melts

“…From a theoretical perspective, ionic materials are strongly interacting closed-shell systems, and so push to the limit a description of their properties through the theory of intermolecular forces 1 . In materials with polyvalent cations, the spectra contain distinctive bands which are the signatures of particular coordination structures 2 . Raman spectra may be especially sensitive to particular intermediate-range structures, as with the signature of boroxyl rings in the spectra of borate glasses 3,4 .…”

“…Nevertheless, the conversion of the pattern of bands seen in a spectrum into structural information is not straightforward 9 . In dilute solutions of a polyvalent cation in a simple salt, the spectra of discrete molecular ions may be recognised by their polarization characteristics and the pattern of band frequencies 2 , but in more concentrated melts, these coordination polyhedra overlap, networks form and the direct interpretation of the spectrum becomes more hazardous.…”