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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
Kyoto Pharmaceutical University, Yamashina, Kyoto 607, Japan
Akira Tsuchiyama
Osaka University, Toyonaka, Osaka 560, Japan


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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.

Interplanetary Dust: Physical and Chemical Analysis
Copyright © Kluwer 1991


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