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The Infrared Spectra of Synthesized Amorphous Silicates with Compositions of Olivine and Pyroxene

Published online by Cambridge University Press:  12 April 2016

Chiyoe Koike  and
Akira Tsuchiyama
Chiyoe Koike
Affiliation:
Kyoto Pharmaceutical University, Yamashina, Kyoto 607, Japan
Akira Tsuchiyama
Affiliation:
Osaka University, Toyonaka, Osaka 560, Japan

Abstract

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Amorphous olivines synthesized by evaporation method show two very broad bands at 10-11 μm and 17.5-19 μm, which resemble the spectra of symbiotic stars. On the other hand, amorphous pyroxenes produced by the same method show two broad bands at 9.5-10.3 μ and 20-22 μ which are narrower than that of amorphous olivine. The features of amorphous olivine were easily altered by heating or hydration, and the peak wavelength of 18 μm band was easily shifted to longer wavelengths.

Type
Interplanetary Dust: Physical and Chemical Analysis
Information
International Astronomical Union Colloquium , Volume 126: Origin and Evolution of Interplanetary Dust , 1991 , pp. 95 - 98
Copyright
Copyright © Kluwer 1991

References

B.G.Anandarao, ,Taylor, A.R. and Pottasch, S.R.,(1988)’Dust emission from symbiotic stars: an interpretation of IRAS observations.’,Astron. Astrophys.203, 361–366.Google Scholar
C.Koike, and Hasegawa, H.,(1987)’Mid-infrared extinction coefficients of amorphous silicates’, Astrophys. Space Sience 134, 361–379.Google Scholar