Stability of CaCl2-type and α-PbO2-type SiO2 at high pressure and temperature determined by in-situ X-ray measurements

Geophysical Research Letters

Volumn 30, Issue 5, 2003, Pages

  Murakami, Motohiko ^a   Hirose, Kei ^a   Ono, Shigeaki ^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

CALCIUM COMPOUNDS; LASER APPLICATIONS; PHASE TRANSITIONS; SILICA; X RAY ANALYSIS; CALCULATIONS; D REGION; EXPERIMENTAL MINERALOGY; HIGH PRESSURE ENGINEERING; LEAD OXIDE; WAVE PROPAGATION;

PHASE BOUNDARY; AMORPHOUS SILICA; BULK COMPOSITIONS; FIRST-PRINCIPLES CALCULATION; HIGH-PRESSURE AND TEMPERATURES; KINETIC EFFECT; LASER-HEATED DIAMOND ANVIL CELLS; SEISMIC WAVE VELOCITY; TYPE STRUCTURES;

GEOPHYSICAL PROSPECTING; SILICA;

DIAMOND ANVIL CELL; EXPERIMENTAL MINERALOGY; HIGH PRESSURE; HIGH TEMPERATURE; LOWER MANTLE; MANTLE CHEMISTRY; PHASE TRANSITION; SILICA;

EID: 0043202797     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2002gl016722     Document Type: Article

References (18)

1. Andrault, D., G. Fiquet, F. Guyot, and M. Hanfland, Pressure-induced Landau-type transition in stishovite, Science, 282, 720-724, 1998.
2. 2 at high pressure linear augmented plane wave calculations, Am. Mineral., 76, 733-742, 1991.
3. Dubrovinsky, L. S., S. K. Saxena, P. Lazor, R. Ahuja, O. Erikson, J. M. Wills, and B. Johansson, Experimental and theoritical identification of a new high-pressure phase of silica, Nature, 388, 362-365, 1997.
4. Dubrovinsky, L. S., N. A. Dubrovinskaia, S. K. Saxena, F. Tutti, S. Rekhi, T. Le Bihan, G. Shen, and J. Hu, Pressure induced transformations of cristobalite, Chem. Phys. Lett., 333, 264-270, 2001.
5. Holmes, N. C., J. A. Moriarty, G. R. Gathers, and W. J. Nellis, The equation of state of platinum to 660 GPa (6.6 Mbar), J. Appl. Phys., 66, 2962-2967, 1989.
6. Karki, B. B., L. Stixrude, and J. Crain, Ab initio elasticity of three high-pressure polymorphs of silica, Geophys. Res. Lett., 24, 3269-3272, 1997.
7. Kingma, K. J., R. E. Cohen, R. J. Hemley, and H. K. Mao, Transformation of stishovite to a denser phase of silica, Nature, 374, 243-245, 1995.
8. Knittle, E., and R. Jeanloz, Core-mantle boundary: results of experiments at high pressures and temperatures, Science, 251, 1438-1443, 1991.
9. 2 determined by in situ X-ray observations, Earth Planet. Sci. Lett., 197, 187-192, 2002a.
10. Ono, S., K. Hirose, M. Isshiki, K. Mibe, and Y. Saito, Equation of state of hexagonal aluminous phase in basaltic composition to 63 GPa at 300 K, Phys. Chem. Miner., 29, 527-531, 2002b.
11. 2 polymorph in the meteorite Shergotty: Implications for impact events, Science, 284, 1511-1513, 1999.
12. Shen, G., H. K. Mao, and R. J. Hemley, Laser-heated diamond anvil cell technique: Double-sided heating with multimode Nd: YAG laser, in Advance Materials '96 New Trends in High Pressure Research, 3rd International Symposium Advanced Materials, pp. 149-152, Natl. Inst. for Mater. Sci., Ibaraki, Jpn., 1996.
13. Sidorin, I., M. Gurnis, and D. V. Helmberger, Evidence for a ubiquitous seismic discontinuity at the base of the mantle, Science, 286, 1326-1331, 1999.
14. Teter, D. M., R. J. Hemley, G. Kresse, and J. Hafner, High pressure polymorphism in silica, Phys. Rev. Lett., 80, 2145-2148, 1998.
15. Tsuchiya, T., and K. Kawamura, First-principles electronic thermal pressure of metal Au and Pt, Phys. Rev. B., 66, 94,115-94,119, 2002.
16. van der Hilst, R. D., S. Widiyantoro, K. C. Creager, and T. J. McSweeney, Deep subduction and aspherical variations in P-wavespeed at the base of Earth's mantle, in The Core-Mantle Boundary Region, Geodyn. Ser., vol. 28, edited by M. Gurnis et al., pp. 5-20, AGU, Washington, D. C., 1998.
17. Watanuki, T., O. Shimomura, T. Yagi, T. Kondo, and M. Isshiki, Construction of laser-heated diamond anvil cell system for in situ x-ray diffraction study at Spring-8, Rev. Sci. Instrum., 72, 1289-1292, 2001.
18. Wysession, M. E., A. Langenhorst, M. J. Fouch, K. M. Fischer, G. I. Al-Eqabi, P. J. Shore, and T. J. Clarke, Lateral variations in compressional/shear velocities at the base of the mantle, Science, 284, 120-125, 1999.