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Structure and lattice vibrations of Mg-Al spinel solid solution

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Abstract

X-ray structure refinements have been made for nonstoichiometric (MgO · 3Al2O3) and stoichiometric Mg-Al spinels. Several structure variations with chemical composition have been observed and are discussed in relation to Al substitution in tetrahedral sites. Infrared reflection and Raman spectra of the single crystal of the nonstoichiometric spinel (MgO · 3Al2O3) have been measured and analyzed. The results obtained are compared with those reported for the stoichiometric sample. From the infrared and Raman frequencies reported for the stoichiometric Mg-Al spinel, which are partly complemented with our results, the effective ionic charges of the ions in MgAl2O4 have been estimated on the basis of the rigid ion model.

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Authors and Affiliations

  1. National Institute for Research in Inorganic Materials, 1-1 Namiki, Sakura-mura, Niihari-gun, 305, Ibaraki, Japan

    M. Ishii

  2. National Chemical Laboratory for Industry, 1-1 Higashi, Yatabe-machi, Tsukuba-gun, 305, Ibaraki, Japan

    J. Hiraishi

  3. Mineralogical Institute, Faculty of Science, University of Tokyo, Hongo, 113, Tokyo, Japan

    T. Yamanaka

Authors
  1. M. Ishii
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  2. J. Hiraishi
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  3. T. Yamanaka
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Ishii, M., Hiraishi, J. & Yamanaka, T. Structure and lattice vibrations of Mg-Al spinel solid solution. Phys Chem Minerals 8, 64–68 (1982). https://doi.org/10.1007/BF00309015

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  • DOI: https://doi.org/10.1007/BF00309015

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