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EPR of a hydrogen/double-lithium centre in α-quartz

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Abstract

 X-band electron paramagnetic resonance experiments on a gamma-irradiated α-quartz crystal have revealed a new hydrogarnet-like defect. Analysis of the spectral data suggests that the centre consists of an oxygenic electron hole adjacent to a silicon vacancy, charge-compensated by a proton and two lithium +1 ions. The principal directions of the spin-Hamiltonian g matrix indicate that the oxygenic hole occurs on the oxygen ion that would be long-bonded to the missing silicon atom. Modelling of the proton and lithium hyperfine matrices via three different methods has provided a detailed physical view for the structure of the defect centre, which is presented here.

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Authors and Affiliations

  1. Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, , , , , , NZ

    N. S. Lees, C. J. Walsby & R. F. C. Claridge

  2. Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatoon S7 N 5C9, Canada. e-mail: john.weil@usask.ca, , , , , , CA

    J. A. Weil

  3. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA, , , , , , US

    J. A. S. Williams

Authors
  1. N. S. Lees
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  2. C. J. Walsby
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  3. J. A. S. Williams
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  4. J. A. Weil
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  5. R. F. C. Claridge
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Additional information

Received: 12 June 2002 / Accepted: 10 January 2003

RID="‡"

ID="‡" Deceased August 2001

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Lees, N., Walsby, C., Williams, J. et al. EPR of a hydrogen/double-lithium centre in α-quartz. Phys Chem Minerals 30, 131–141 (2003). https://doi.org/10.1007/s00269-003-0302-x

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  • DOI: https://doi.org/10.1007/s00269-003-0302-x

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