Advertisement

Studies of Phase Equilibrium in Mg2SiO4 up to Pressures Higher than 20 GPa

  • K. Suito
  • N. Kawai

Abstract

High pressure phase transformations of magnesium silicates have been studied extensively by many investigators relative to the composition of the Earth’s mantle. For example, for Mg2SiO4 Ringwood and Major [1] have reported the existence of the β phases. Suito [2] first succeeded in the synthesis of γ-Mg2SiO4 and studied the α-β phase boundary. Following this work, Ito et al. [3] clarified the detailed crystallographic data of the γ phase. With respect to successive transformation of γ-Mg2SiO4, Kumazawa et al. [4] and Ming and Bassett [5] have reported on its decomposition into the oxide mixture of stishovite plus MgO periclase. On the other hand, Liu [6,7] and Ito [8] have found that the post-spinel phase in Mg2SiO4 is actually the assemblage of MgSiO3 orthorhombic perovskite plus MgO periclase. Recently Suito [9] has reported some detailed stability relations among the α, β and γ phases in Mg2SiO4.

Keywords

Phase Boundary Transition Point Edge Length Pressure Medium Transition Curve 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. E. Ringwood and A. Major, Earth Planet. Sci. Letter 1, 241 (1966).CrossRefGoogle Scholar
  2. 2.
    K. Suito, J. Phys. Earth 20, 225 (1972).CrossRefGoogle Scholar
  3. 3.
    E. Ito, Y. Matsui, K. Suito and N. Kawai, Phys. Earth Planet. Interiors 8, 342 (1974).CrossRefGoogle Scholar
  4. 4.
    M. Kumazawa, H. Sawamoto, E. Ohtani and K. Masaki, Nature 247, 356 (1974).CrossRefGoogle Scholar
  5. 5.
    L. Ming and W. A. Bassett, Science 187, 66 (1975).CrossRefGoogle Scholar
  6. 6.
    L. Liu, Geophys. Res. Lett. 2, 417 (1975).CrossRefGoogle Scholar
  7. 7.
    L. Liu, Nature 262, 770 (1976).CrossRefGoogle Scholar
  8. 8.
    E. Ito, Geophys. Res. Lett. 4, 72 (1977).CrossRefGoogle Scholar
  9. 9.
    K. Suito, in High-Pressure Research: Applications to Geophysics, M. H. Manghnani and S. Akimoto, eds., Academic Press, New York (1977), p. 255.CrossRefGoogle Scholar
  10. 10.
    N. Kawai, M. Togaya and A. Onodera, Proc. Japan Acad. 49, 623 (1973).Google Scholar
  11. 11.
    T. Yagi and S. Akimoto, Tectonophysics 35, 259 (1976).CrossRefGoogle Scholar
  12. 12.
    S. Akimoto, T. Yagi and K. Inoue, in High-Pressure Research: Applications to Geophysics, M. H. Manghnani and S. Akimoto, eds., Academic Press, New York (1977), p. 585.CrossRefGoogle Scholar
  13. 13.
    K. Suito, N. Kawai and Y. Masuda, Mat. Res. Bull. 10, 677 (1975).CrossRefGoogle Scholar
  14. 14.
    A. E. Ringwood and A. Major, Phys. Earth Planet. Interiors 3, 89 (1970).CrossRefGoogle Scholar
  15. 15.
    S. Akimoto, Y. Matsui, and Y. Syono, in Physics and Chemistry of Minerals and Rocks, R.G.J. Strus, ed., Wiley-Interscience, London (1976), p. 327.Google Scholar

Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • K. Suito
    • 1
  • N. Kawai
    • 1
  1. 1.Osaka UniversityToyonaka, OsakaJapan

Personalised recommendations