Vibrational studies of olivine-type compounds—I. The i.r. and Raman spectra of the isotopic species of Mg2SiO4

Paques-Ledent, M.Th.; Tarte, P.

doi:10.1016/0584-8539(73)80140-0

Cited by 95 publications

(55 citation statements)

References 6 publications

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“…They found, however, that bands in the range 991 cm-1, 960-950 cm-1 and 900-885 cm 1 were sensitive to variations in the Si isotope content, and inferred that they were related to v3, anti-symmetric stretching modes, in which significant Si displacement is to be expected. Paques-Ledent and Tarte (1973) also found that bands in the range 650-475 cm-1 showed a frequency dependence on both Si and Mg isotope content. They were unable to infer the exact nature of the vibrations involved, however it is generally accepted that the vibrations in this region of the forsterite spectra are associated with internal Si-O bending vibrations.…”

Section: The Crystal Dynamics Of Forsteritementioning

confidence: 80%

“…The infrared and Raman Spectra of forsterite have been extensively studied (e.g. Servoin and Piriou, 1973;Paques-Ledent and Tarte, 1973;Iishi, 1978), and there is general agreement on the frequencies of the characteristic vibrations (Table 3). Most infrared and Raman bands have been unambiguously identified, but there is still some controversy over some of the weaker or more poorly resolved peaks (see McMillan, 1985).…”

Section: The Symmetry and Frequencies Of The Q = 0 Lattice Vibrationsmentioning

confidence: 97%

“…Below 475 cm-1, these workers found infrared peaks at 466,425,415,364,320, 300 and 277 cm-1 which showed large frequency shifts with Mg isotope variation, but which had little Si frequency dependence (McMillan, 1985). From there observations Paques- Ledent and Tarte (1973) inferred that the bands were associated with large Mg translations and possibly SiO4 rotations. All the remaining bands observed in their study appeared to involve both Mg and Si displacements.…”

Section: The Crystal Dynamics Of Forsteritementioning

confidence: 99%

“…Considerable uncertainty remains, however, concerning the detailed nature of the atomic motions in many vibrational modes, despite the efforts which have been made to elucidate them by using isotopic substitution techniques (e.g. Paques- Ledent and Tarte, 1973). This aspect of the lattice dynamics of forsterite will be discussed in greater detail in the following section.…”

Section: The Symmetry and Frequencies Of The Q = 0 Lattice Vibrationsmentioning

confidence: 99%

“…They were unable to infer the exact nature of the vibrations involved, however it is generally accepted that the vibrations in this region of the forsterite spectra are associated with internal Si-O bending vibrations. Obviously, from the observations of Paques-Ledent and Tarte (1973), these vibrations must be of significantly mixed nature. Below 475 cm-1, these workers found infrared peaks at 466,425,415,364,320, 300 and 277 cm-1 which showed large frequency shifts with Mg isotope variation, but which had little Si frequency dependence (McMillan, 1985).…”

Section: The Crystal Dynamics Of Forsteritementioning

confidence: 99%

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The lattice dynamics of forsterite

1987

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We use an approach based upon the atomistic or Born model of solids, in which potential functions represent the interactions between atoms in a structure, to calculate the infrared and Raman vibrational frequencies of forsterite. We investigate a variety of interatomic potentials, and find that although all the potentials used reproduce the structural and elastic behaviour of forsterite, only one potential (THB1) accurately predicts its lattice dynamics. This potential includes 'bond-bending' terms, that model the directionality of the Si-O bond, which we suggest plays a major role in determining the structural and physical properties of silicates. The potential was derived empirically from the structural and physical data of simple oxides, and its ability to model the lattice dynamics of forsterite is a significant advance over previous, force-constant models, which have been simply derived by fitting to the spectroscopic data that they aim to model. The success that we have had in predicting the lattice dynamics of forsterite indicates that the potential provides the previously elusive yet fundamental, quantitative link between the microscopic or atomistic behaviour of a mineral and its macroscopic or bulk thermodynamic properties.

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Section: The Crystal Dynamics Of Forsteritementioning

confidence: 80%

Section: The Symmetry and Frequencies Of The Q = 0 Lattice Vibrationsmentioning

confidence: 97%

Section: The Crystal Dynamics Of Forsteritementioning

confidence: 99%

Section: The Symmetry and Frequencies Of The Q = 0 Lattice Vibrationsmentioning

confidence: 99%

Section: The Crystal Dynamics Of Forsteritementioning

confidence: 99%

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The lattice dynamics of forsterite

1987

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Applications of Vibrational Spectroscopy to Geology

Gillet

2001

Handbook of Vibrational Spectroscopy

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The sections in this article are Introduction Vibrational Spectra of Minerals, Glasses and Fluids: Basic Aspects Minerals: The Example of Carbonates Glasses: The Example of Si O 2 Fluids Micro‐ R aman and Micro‐Infrared Spectroscopy Micro‐ R aman Spectroscopy Micro‐Infrared Spectroscopy Vibrational Spectroscopy of Minerals at High Pressure and Temperature The Diamond Anvil Cell Vibrational Spectroscopy at Elevated Temperatures Some Examples in the Si O 2 System From Vibrational Spectra of Minerals to Thermodynamic Properties Spectroscopic Data for Some Representative Mineral Groups Simple Minerals: Diamond, Graphite, Alkali Halides, Mg O , Ti O 2 and Simple Hydrous Phases Si O 2 Polymorphs and Glass Orthosilicates Feldspars, Feldspathic Glasses and Other Framework Aluminosilicates Chain Silicates: Pyroxenes and Amphiboles Sheet Silicates: Micas, Clays and Serpentines Pyrosilicates Ring Silicates Corundum and Ilmenite Perovskites Spinels Carbonates Phosphates Sulfates and Sulfides Conclusion Acknowledgments

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Vibrational Spectroscopy for the Analysis of Geological and Inorganic Materials

Busca

Resini

2000

Encyclopedia of Analytical Chemistry

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The vibrational spectroscopies are those producing the entire (or part) vibrational spectrum of a sample, i.e. the collection of transition energies between its vibrational states. The simplest way to cause vibrational excitation is to allow the chemical species in its vibrational ground state to absorb an energy quantum from electromagnetic radiation of an appropriate energy, i.e. in the medium infrared (IR) or in the far infrared (FIR) regions. Transmission–absorption IR spectroscopy comprises the analysis of the quanta that are actually absorbed by a polyatomic chemical species and those that are not absorbed (so are transmitted). Other IR techniques relate to the analysis of the radiation that is emitted, diffused, or reflected by the sample. Another way to obtain part or all of the vibrational spectrum of a chemical species is to look at the inelastic scattering of beams other than IR radiation. Raman spectrometry is the analysis of the ultraviolet (UV), visible or near infrared (NIR) radiation that is scattered inelastically by the sample. Inelastic neutron scattering (INS) is the analysis of the energy of formerly monochromatic neutron beams after inelastic scattering by the sample. Analyses of the number and energies of the vibrational transitions of the sample, detected by each technique, yield information on the geometric (molecular and crystallographic) structure of the sample and on the strength and nature of the chemical bonds it contains.

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Vibrational studies of olivine-type compounds—I. The i.r. and Raman spectra of the isotopic species of Mg2SiO4

Cited by 95 publications

References 6 publications

The lattice dynamics of forsterite

The lattice dynamics of forsterite

Applications of Vibrational Spectroscopy to Geology

Vibrational Spectroscopy for the Analysis of Geological and Inorganic Materials

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