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Volume 57 Supplement 5

Special Issue: Special Section for the 2004 Mid-Niigata Prefecture Earthquake (1)

Direct observation of the formation of alumina phase by metallic Al solid-SiO2 solid reaction


The formation of Al2O3 phases by the solid-solid reaction of a metallic Al layer evaporated on a SiO2 amorphous grain has been induced by heating above 600°C in vacuum (1×10−6 Pa). The distortion process of the amorphous SiO2 grains by the formation of Al2O3 have been directly imaged by in-situ TEM observation. A partly deposited Al layer covered the SiO2 grains after heating at 750?C, and ψ -Al2O3 grains of about 25 nm diameters were formed on the SiO2 surface. Upon the growth of Al2O3, the SiO2 grain decomposed into a mixture of metallic Si and SiO2 and disappeared as a result of sublimation due to the formation of SiOx at high temperatures. The present result on dust surface dynamics will become an important field with respect to the metamorphism of grains from the astromineralogical viewpoint.


  • Anders, E., A. Virag, E. Zinner, and R. S. Lewis, 26Al and 16O in the early solar system, Clues from meteorite Al2O3, Astrophys. J., 373, L77–L80, 1991.

    Article  Google Scholar 

  • Grossman, L., Condensation in primitive solar nebula, Geochim. Cosmochim. Acta., 36, 597–619, 1972.

    Article  Google Scholar 

  • Kamitsuji, K., H. Suzuki, Y. Kimura, Y. Saito, and C. Kaito, Crystalline forsterite grain formation due to the coalescence growth of MgO and SiO2 smoke particles, Proceedings of the 36th ISAS Lunar and Planetary Symposium., 262–265, 2003.

    Google Scholar 

  • Kamitsuji, K., S. Ueno, H. Suzuki, T. Sato, T. Tanigaki, O. Kido, M. Kurumada, and C. Kaito, Direct observation of the metamorphism of silicon oxide grains, Astron. Astrophys., 975–979, 2004.

    Google Scholar 

  • Kimura, S., K. Kamei, N. Tsuda, Y. Saito, C. Koike, and C. Kaito, Electron microscopic and infrared spectral studies on the structure of alumina phases, Proc. NIPR Symp. Antarct. Meteorites, 9, 237–243, 1996.

    Google Scholar 

  • Kimura, S., C. Kaito, and S. Wada, Formation of micro-diamond by heat treatment of quenched carbonaceous composite (QCC), Antarctic Meteorite Res., 13, 145–152, 2000.

    Google Scholar 

  • Kornacki, A. S. and B. Fegley, Origin of spinel rich chondrules and inclusion in carbonaceous and ordinary condrites, J. Geophys. Res. Sup., 89, B588–B596, 1984.

    Article  Google Scholar 

  • Kozasa, T. and H. Sogawa, Formation of dust grains in circumstellar envelopes of oxygen-rich AGB stars, Astrophysics and Space Science, 251, 165–170, 1997.

    Article  Google Scholar 

  • Kozasa, T., H. Hasegawa, and K. Nomoto, Formation of dust grains in the ejecta of SN 1987A, Astrophys. J., 344, 325–331, 1989.

    Article  Google Scholar 

  • Messenger, S., L. P. Keller, F. J. Stadermann, R. M. Walker, and E. Zinner, Samples of stars beyond the solar system: silicate grains in interplanetary dust, Science, 300, 105–108, 2003.

    Article  Google Scholar 

  • Morioka, T., S. Kimura, N. Tsuda, C. Kaito, Y. Saito, and C. Koike, Study of the structure of silica film by infrared spectroscopy and electron diffraction analyses, Mon. Not. R. Astron. Soc., 299, 78–82, 1998.

    Article  Google Scholar 

  • Nagashima, K., A. N. Krot, and H. Yurimoto, In-situ discovery of presolar silicates from primitive chondrites, Lunar Planetary Science, 35, #1661, 2004.

    Google Scholar 

  • Nguyen, A. N. and E. Zinner, Discovery of ancient silicate stardust in a meteorite, Science, 303, 1496–1499, 2004.

    Article  Google Scholar 

  • Nuth, J. A., Grain formation and metamorphism, in The Cosmic Dust Connection, edited by J. M. Greenberg, pp. 205–221, Academic Publishers, Netherlands, 1996.

    Chapter  Google Scholar 

  • Sato, T., A. Takeda, Y. Kimura, H. Suzuki, Y. Saito, and C. Kaito, Structural control of silicon oxide particles by oxygen partial pressure in RF plasma, Jpn. J. Appl. Phys., 42, 5896–5897, 2003.

    Article  Google Scholar 

  • Virag, A., E. Zinner, S. Amari, and E. Anders, An ion micro probe study of corundum in the Murchison meteorite, Implications for 26Al and 10O in the early solar system, Geochim. Cosmochim. Acta., 55, 2045–2062, 1991.

    Article  Google Scholar 

  • Yamamoto, T. and H. Hasegawa, Grain formation through nucleation process in astrophysical environment, Prog. Theo. Phys., 58, 816–828, 1977.

    Article  Google Scholar 

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Correspondence to C. Kaito.

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Sasaki, S., Suzuki, H., Kimura, Y. et al. Direct observation of the formation of alumina phase by metallic Al solid-SiO2 solid reaction. Earth Planet Sp 57, 399–401 (2005).

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