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Applied Magnetic Resonance

, Volume 18, Issue 4, pp 559–564 | Cite as

ESR study of a new electron center in synthetic stishovite, a high-pressure polymorph of silica

  • A. Tani
  • C. Yamanaka
  • M. Ikeya
  • O. Ohtaka
  • T. Katsura
Article

Abstract

A new unidentified electron center in γ-ray-irradiated synthetic stishovite, a high-pressure polymorph of SiO2, was detected by X-band electron spin resonance. It has an anisotropicg-factor of orthorhombic symmetry,g 1 = 1.9764,g 2 = 1.9527 andg 3 = 1.9370. The signal intensity was saturated at a microwave power of 2 mW. Annealing experiments show that the center was annealed out around 280 K and unstable at room temperature. The center may be ascribed to a titanium electron center on the basis of a relatively largeg-shift and a comparison with the paramagnetic centers in quartz.

Keywords

Electron Spin Resonance Electron Spin Resonance Spectrum Microwave Power Electron Spin Resonance Signal Electron Center 
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 2000

Authors and Affiliations

  • A. Tani
    • 1
  • C. Yamanaka
    • 1
  • M. Ikeya
    • 1
  • O. Ohtaka
    • 1
  • T. Katsura
    • 2
  1. 1.Department of Earth and Space ScienceOsaka UniversityOsakaJapan
  2. 2.Institute for Study of the Earth’s InteriorOkayama UniversityTottoriJapan

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