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)


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.


Sound Velocity High Temperature Phase Acoustic Phonon Principal Plane Phonon Velocity 
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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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