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Brillouin-Scattering Study of Sound Velocity of Quartz at α-ß Transition

  • H. Unoki
  • H. Tokumoto
  • T. Ishiguro
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 51)

Abstract

It is well known that quartz (SiO2) undergoes the first-order phase transition at 573°C from the lower temperature trigonal (α) phase to the higher-temperature hexagonal (ß) phase accompanying an anomaly in the velocity of a particular acoustic phonon. But the mechanism of the transition has not been fully understood. In this paper we propose a mechanism of the transition based on the elastic constants derived from Brillouin scattering. The measurements were carried out at temperatures up to 700°C with emphasis on the propagation direction dependence in three principal planes as well as their temperature dependence.

Keywords

Sound Velocity High Temperature Phase Acoustic Phonon Principal Plane Phonon Velocity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • H. Unoki
    • 1
  • H. Tokumoto
    • 1
  • T. Ishiguro
    • 1
  1. 1.Electrotechnical LaboratorySakura-Mura, Niihari-Gun Ibaraki 305Japan

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