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Compressibility of calcium ferrite-type MgAl2O4

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Abstract

 In situ X-ray diffraction experiments of calcium ferrite-type MgAl2O4 have been carried out using a diamond anvil cell combined with synchrotron radiation and an imaging plate X-ray detector under hydrostatic pressures up to 9 GPa. The observed unit-cell volumes at various pressures were fitted to the Birch-Murnaghan equation of state, yielding a bulk modulus of K T 0= 241(3) GPa when K′ T 0=4 is assumed. This relatively large bulk modulus of calcium ferrite-type MgAl2O4 is consistent with that expected from the systematic relation between bulk modulus and molar volume for the most compounds possessing fcc oxygen packing.

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Authors and Affiliations

  1. Institute for Solid State Physics, University of Tokyo, 7-22-1, Roppngi, Minato-ku, Tokyo 106, Japan, , , , , , JP

    Mina Yutani, Takehiko Yagi & Hitoshi Yusa

  2. Department of Earth Science, Faculty of Science, Ehime University, 2-5, Bunkyo-cho, Matsuyama 790, Japan, , , , , , JP

    Tetsuo Irifune

Authors
  1. Mina Yutani
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  2. Takehiko Yagi
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  3. Hitoshi Yusa
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  4. Tetsuo Irifune
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Received March 5, 1996/Revised, accepted October 15, 1996

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Yutani, M., Yagi, T., Yusa, H. et al. Compressibility of calcium ferrite-type MgAl2O4 . Phys Chem Min 24, 340–344 (1997). https://doi.org/10.1007/s002690050047

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  • DOI: https://doi.org/10.1007/s002690050047

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