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The Effect of Total Pressure on Vaporization of Alkalis from Partially Molten Chondritic Material

Published online by Cambridge University Press:  12 April 2016

Taro Shimaoka  and
Noboru Nakamura
Taro Shimaoka
Affiliation:
Department of Science of Material Differentiation, Graduate School of Science and Technology, Kobe University
Noboru Nakamura
Affiliation:
Department of Science of Material Differentiation, Graduate School of Science and Technology, Kobe University Department of Earth Sciences, Faculty of Science, Kobe University, Nada, Kobe 657, Japan

Abstract

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In order to examine the effect of total pressure on vaporization of alkalis (Na, K, Rb) from a partially molten chondritic material, heating experiments were carried out under various He gas pressures (~10−5-~10−1torr) at 1300°C. The rate of vaporization decreased in the order of Na > K > Rb with the increasing of the pressure, and reached a minimum at ~10−1torr.

Type
Interplanetary Dust: Physical and Chemical Analysis
Information
International Astronomical Union Colloquium , Volume 126: Origin and Evolution of Interplanetary Dust , 1991 , pp. 79 - 82
Copyright
Copyright © Kluwer 1991

References

Gibson, E. K. Jr. and Hubbard, N. J. (1972) ‘Thermal volatilization studies on lunar samples’, Proc. Lunar Conf. 3rd, 2003–2014.Google Scholar
Kreutzberger, M. E., Drake, J. V. and Lewis, V. A. (1985) ’Origin of the Earth’s Moon: Constrains from alkali volatile trace elements’, Geochim. Cosmochim. Acta 49, 91–98 Google Scholar
Matsuda, H., Nakamura, N. and Noda, S. (1990) ’Alkali(Rb/K) abundances in Allende chondrules: Implication for the melting conditions of chondrules’, Meteoritics 25, 137–143.CrossRefGoogle Scholar
Shimaoka, T. and Nakamura, N. (1989) ’Vaporization of sodium from a partially molten chondritic material’, Proc. NIPR Symp. Antarct. Meteorites 2, 252–267.Google Scholar
Tsuehiyama, A., Nagahara, H. and Kushiro, I. (1981) ’Volatilization of sodium from silicate melt spheres and its application to the formation of chondrules’, Geochim. Cosmochim. Acta 45, 1357–1367.CrossRefGoogle Scholar