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Polarization effects in the infrared spectra of α-quartz and α-cristobalite

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Abstract

The effect of anisotropy and particle shape has been analysed in the infrared powder spectra of α-quartz and α-cristobalite by using theTheory of theAverage Dielectric Constant. Information is obtained regarding the applicability of the theory to these compounds of low polarizability as well as on the contribution of each atom to the vibrational modes. It is shown that the strong tendency of these oxides to adopt a platelike morphology is the reason for the small variability observed in their infrared powder spectra.

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Authors and Affiliations

  1. Instituto de Ciencia de Materiales, C.S.I.C., Serrano, 115 dpdo., 28006, Madrid, Spain

    M. Ocaña, V. Fornes & C. J. Serna

  2. Instituto de Optica, C.S.I.C., Serrano, 121, 28006, Madrid, Spain

    J. V. Garcia-Ramos

Authors
  1. M. Ocaña
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  2. V. Fornes
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  3. J. V. Garcia-Ramos
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  4. C. J. Serna
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Ocaña, M., Fornes, V., Garcia-Ramos, J.V. et al. Polarization effects in the infrared spectra of α-quartz and α-cristobalite. Phys Chem Minerals 14, 527–532 (1987). https://doi.org/10.1007/BF00308288

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  • DOI: https://doi.org/10.1007/BF00308288

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