Post-Perovskite Phase Transition in MgSiO3

Science

Volumn 304, Issue 5672, 2004, Pages 855-858

  Murakami, Motohiko ^a   Hirose, Kei ^a   Kawamura, Katsuyuki ^a   Sata, Nagayosh ^b   Ohishi, Yasuo ^c  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

^b JAPAN AGENCY FOR MARINE EARTH SCIENCE AND TECHNOLOGY   (Japan)

^c JAPAN SYNCHROTRON RADIATION RESEARCH INSTITUTE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

CRYSTAL STRUCTURE; ELASTICITY; HIGH PRESSURE EFFECTS; HIGH TEMPERATURE EFFECTS; PEROVSKITE; PHASE TRANSITIONS; SEISMOLOGY; SHEAR FLOW; X RAY DIFFRACTION ANALYSIS;

EARTH'S CORE-MANTLE BOUNDARY; SEISMIC ANISOTROPY;

MAGNESIUM COMPOUNDS;

MAGNESIUM SILICATE; PEROVSKITE;

CORE-MANTLE BOUNDARY; MANTLE DISCONTINUITY; PEROVSKITE; PHASE TRANSITION; SEISMIC ANISOTROPY;

ANISOTROPY; ARTICLE; COMPRESSION; GEOCHEMISTRY; HIGH TEMPERATURE; PHASE TRANSITION; PRIORITY JOURNAL; SHEAR FLOW; X RAY DIFFRACTION;

XIPHOPHORUS MACULATUS;

EID: 2442571061     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1095932     Document Type: Article

References (30)

1. B. J. Mitchell, D. V. Helmberger, J. Geophys. Res. 78, 6009 (1973).
2. T. Lay, D. V. Helmberger, Geophys. J. R. Astron. Soc. 75, 799 (1983).
3. M. E. Wysession et al., in The Core-Mantle Boundary Region, M. Gumis, M. E. Wysession, E. Knittle, B. A. Buffet, Eds. (American Geophysical Union, Washington, DC, 1998), vol. 28, pp. 273-297.
4. I. Sidorin, M. Gurnis, D. V. Helmberger, Science 286, 1326 (1999).
5. E. Knittle, R. Jeanloz, Science 235, 668 (1987).
6. G. Serghiou, A. Zerr, R. Boehler, Science 280, 2093 (1998).
7. G. Fiquet, A. Dewaele, D. Andrault, M. Kunz, T. Le Bihan, Geophys. Res. Lett. 27, 21 (2000).
8. R. M. Wentzcovitch, J. L. Martins, G. D. Price, Phys. Rev. Lett. 70, 3947 (1993).
9. L. Stixrude, R. E. Cohen, Nature 364, 613 (1993).
10. M. C. Warren, G. J. Ackland, B. B. Karki, S. J. Clark, Mineral. Mag. 62, 585 (1998).
11. S. H. Shim, T. S. Duffy, G. Shen, Science 293, 2437 (2001).
12. C. Meade, H. K. Mao, J. Hu, Science 268, 1743 (1995).
13. S. K. Saxena et al., Science 274, 1357 (1996).
14. H. K. Mao, G. Shen, R. J. Hemley, Science 278, 2098 (1997).
15. XRD spectra were collected on an imaging plate with an exposure time of 1 to 5 min. A monochromatic Incident x-ray beam with a wavelength of 0.4134 or 0.4136 Å was collimated to 20 μm in diameter. The two-dimensional XRD image was Integrated as a function of 2θ In order to give a conventional one-dimensional diffraction profile.
16. M. Murakami, K. Hirose, S. Ono, Y. Ohishi, Geophys. Res. Lett. 30, 11 (2003).
17. S. Ono, K. Hirose, M. Isshiki, K. Mibe, Y. Saito, Phys. Chem. Miner. 29, 527 (2002).
18. G. Shen, H. K. Mao, R. J. Hemley, in Proceedings of the 3rd NIRIM International Symposium on Advanced Materials (National Institute for Research in Inorganic Materials, Tsukuba, Japan, 1996), pp. 149-152.
19. T. Watanuki, O. Shimomura, T. Yagi, T. Kondo, M. Isshiki, Rev. Sci. Instrum. 72, 1289 (2001).
20. J. C. Jamieson, J. N. Fritz, M. H. Manghnani, in High Pressure Research in Geophysics, S. Akimoto, M. H. Manghnani, Eds. (Reidel Boston, 1982).
21. S. H. Shim, T. S. Duffy, G. Shen, Phys. Earth Planet. Int. 120, 327 (2000).
22. T. Uchida, N. Funamori, K. Oguri, Y. Nakamura, T. Yagi, Rev. High Press. Sci. Technol. 5, 261 (1996).
23. D. H. Xiong, L. C. Ming, M. H. Manghnani, Phys. Earth Planet. Int. 43, 244 (1986).
24. 3 structure at 300 K (observed a = 4.325 Å b = 4.579 Å, and c = 6.308 Å calculated a = 4.403 å, b = 4.574 Å, and c = 6.410 Å at 109 GPa).
25. G. Fiquet et al., Phys. Earth Planet. Int. 105, 21 (1998).
26. P. H. Noël J. Padiou, Acta Crystallogr. B32, 1593 (1976).
27. I. Sidorin, M. Gumis, D. V. Helmberger, J. Geophys. Res. 104, 15005 (1999).
28. G. Masters, D. Gubbins, Phys. Earth Planet. Int. 140, 159 (2003).
29. Y. Fei, Am. Mineral. 84, 272 (1999).
30. We thank Y. Tatsumi, T. Tsuchiya, D. Yuen, J. Tuff, and Y. Kuwayama for discussions. In situ x-ray measurements were conducted at Spring-8 (proposal no. 2002B0537-ND2-np and 2003A0013-LD2-np). M.M. was supported by the Japan Society for the Promotion of Science (JSPS) Research Fellowships for Young Scientists.