Raman and inelastic neutron scattering by vitreous ZnCl2

Galeener, F. L.; Mikkelsen, J. C.; Wright, Adrian C.; Sinclair, Roger N.; Desa, J.A.E.; Wong, Joe

doi:10.1016/0022-3093(80)90004-6

Cited by 27 publications

(9 citation statements)

References 15 publications

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“…However, frequencies around 20 meV seem to be underestimated in the calculations. The measured neutron data [34] for vitreous ZnCl 2 and the Raman density of states data [35] for molten ZnCl 2 are qualitatively similar to the present neutron data on crystalline α-ZnCl 2 .…”

Section: Phonon Dispersion Relations and Phonon Density Of States In ...supporting

confidence: 84%

“…4) confirm two broad structures with a band gap around 25 meV. The measured neutron data [34] for vitreous ZnCl 2 and the Raman density of states data [35] for molten ZnCl 2 are qualitatively similar to the present neutron data on crystalline α-ZnCl 2 . The computed partial phonon density of states is shown in Fig 5(a).…”

Section: Vibrational Modes: Raman and Infrared Activesupporting

confidence: 83%

See 1 more Smart Citation

Collective dynamics in crystalline polymorphs of ZnCl₂: potential modelling and inelastic neutron scattering study

Sen¹,

Rao²,

Mittal³

et al. 2005

J. Phys.: Condens. Matter

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We report a phonon density of states measurement of α-ZnCl 2 using the coherent inelastic neutron scattering technique and a lattice dynamical calculation in four crystalline phases of ZnCl 2 using a transferable interatomic potential. The model calculations agree reasonably well with the available experimental data on the structures, specific heat, Raman frequencies and their pressure variation in various crystalline phases. The calculated results have been able to provide a fair description of the vibrational as well as the thermodynamic properties of ZnCl 2 in all its four phases.

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Section: Phonon Dispersion Relations and Phonon Density Of States In ...supporting

confidence: 84%

Section: Vibrational Modes: Raman and Infrared Activesupporting

confidence: 83%

Collective dynamics in crystalline polymorphs of ZnCl₂: potential modelling and inelastic neutron scattering study

Sen¹,

Rao²,

Mittal³

et al. 2005

J. Phys.: Condens. Matter

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“…The dominant Raman line for pure vitreous ZnCl 2 is seen at approximately 230 cm −1 [12]. While our spectra do not show a sharp line at this wavelength, there is intensity, so other vibrations could mask the line.…”

Section: Raman Scatteringcontrasting

confidence: 55%

Cation coordination in oxychloride glasses

Johnson

Holland

Bland

et al. 2003

J. Phys.: Condens. Matter

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Glasses containing mixtures of cations and anions of nominal compositions [Sb 2 O 3 ] x -[ZnCl 2 ] 1−x where x = 0.25, 0.50, 0.75, and 1.00, have been studied by means of neutron diffraction and Raman and Mössbauer spectroscopy. There is preferential bonding within the system with the absence of Sb-Cl bonds. Antimony is found to be threefold coordinated to oxygen, and zinc fourfold coordinated. The main contributing species are of the form [Sb(OSb) 2 (OZn)] and [Zn(ClZn) 2 (OSb) 2 ].

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“…This correction is especially important for temperature dependence studies of bands below 500 cm-I . c) In cases of amorphous materials the R ( w ) is related to the far IR absorption spectra and to the vibrational density of states [23].…”

Section: Resultsmentioning

confidence: 99%

Changes of vibrational modes upon melting mercury (II) halides

Voyiatzis

Papatheodorou

1994

Ber Bunsenges Phys Chem

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Raman spectra of the “molecular” polycrystalline solids HgCl2 (D), HgBr2 (C) and of the yellow form of HgI2 (C) were measured from LN2 up to premelting temperatures. Polarized Raman spectra of molten HgX2 (X = Cl, Br, I) were measured at temperatures up to 950 K. The pure rotational band contour and the vibrational rotational contour of the HgX2 vapors were also measured. Upon melting the vibrational modes of the high temperature solid appear to be preserved. The spectra of the three liquids are similar and are best correlated to the spectra of the D (HgCl2) solid and the vibrational modes of the HgX2 molecules. Reduced Raman spectra of the liquids show splitting of the stretching mode to a doublet, ν1 (A1) and ν1 (B2g), which is attributed to strong intermolecular coupling. The ν2 and ν3 internal modes of the solid are also transferred into the melt. The predominant features of the low frequency reduced spectra is a band, VR, which is assigned to the rotatory modes of the HgX2 molecules and can be correlated to both the rotational band contour of the vapor and the librational modes of the solid. With increasing temperature the spectra of the liquid show softening of the rotatory modes and a blue shift of the ν1 mode, both implying weakening of the intermolecular coupling. An overall decrease in the Raman intensity of the liquid spectra with increasing temperature is attributed to the rapid molar volume increase.

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Raman and inelastic neutron scattering by vitreous ZnCl2

Cited by 27 publications

References 15 publications

Collective dynamics in crystalline polymorphs of ZnCl₂: potential modelling and inelastic neutron scattering study

Collective dynamics in crystalline polymorphs of ZnCl₂: potential modelling and inelastic neutron scattering study

Cation coordination in oxychloride glasses

Changes of vibrational modes upon melting mercury (II) halides

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Raman and inelastic neutron scattering by vitreous ZnCl2

Cited by 27 publications

References 15 publications

Collective dynamics in crystalline polymorphs of ZnCl2: potential modelling and inelastic neutron scattering study

Collective dynamics in crystalline polymorphs of ZnCl2: potential modelling and inelastic neutron scattering study

Cation coordination in oxychloride glasses

Changes of vibrational modes upon melting mercury (II) halides

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Product

Resources

About

Collective dynamics in crystalline polymorphs of ZnCl₂: potential modelling and inelastic neutron scattering study

Collective dynamics in crystalline polymorphs of ZnCl₂: potential modelling and inelastic neutron scattering study