Vibrational Spectra of Transition Metal Hexafluoride Crystals. I. Orthorhombic MoF6, WF6, and UF6 Neat Crystals.

Abstract

Neat crystal Raman spectra of orthorhombic MoF6, WF6, and UF6 are presented and discussed. The neat crystal spectra are interpreted in terms of an internal-external mode separation and a conventional factor group analysis. In general, these data lead to four essential conclusions concerning hexafluoride crystals: (a) Fermi resonance plays an important role in producing the observed energy and intensity differences in this series; (b) k = 0 exciton structures are remarkably similar in the three crystals; (c) similarities and differences between these solids can be directly correlated with molecular parameters such as dipole derivatives, polarizabilities, etc.; and (d) phonons (external modes) can be neatly separated into rotational and translational normal modes.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1977
Accession Number
ADA039765

Entities

People

  • Elliot R. Bernstein
  • Genevive Meredith

Organizations

  • Colorado State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Band Structures
  • Chemistry
  • Crystal Lattice Vibrations
  • Crystal Structure
  • Diffraction
  • Energy Bands
  • Frequency
  • High Resolution
  • Laser Diodes
  • Raman Scattering
  • Raman Spectra
  • Raman Spectroscopy
  • Scattering
  • Spectra
  • Spectroscopy
  • Transition Metals
  • Vibrational Spectra

Fields of Study

  • Chemistry
  • Physics

Readers

  • Materials Science and Engineering.
  • Molecular Photonics/Laser Physics
  • Wave Propagation and Nonlinear Chaotic Dynamics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene