Volume 389, Number 2, July II 2002
|Page(s)||568 - 571|
|Published online||27 June 2002|
Infrared spectra of fayalite crystal
Subaru Telescope, 650 North Aohoku Place, Hilo, Hawaii 96720, USA
2 Kyoto Pharmaceutical University, Yamashina, Kyoto, Japan
3 Osaka University, Department of Earth and Space Science, Toyonaka, Osaka, Japan
4 Communications Research Laboratory, Koganei, Tokyo, Japan
Corresponding author: H. Suto, firstname.lastname@example.org
Accepted: 28 March 2002
Crystalline silicate is an important matter since the ISO discovery of crystalline silicate features in circumstellar dusty environments. Polarized infrared reflection spectra of crystal fayalite (Fe2SiO4), an end member of olivine solid solution, were measured for each crystal axis in infrared region up to 100 μm, and the oscillator parameters of the dielectric constants for each crystal axis are derived by fitting the reflection spectra. The optical constants derived by the oscillator parameters provide a useful standard for the optical characterization of fayalite.
Key words: methods: laboratory / dust / circumstellar matter / ISM: lines and bands
© ESO, 2002
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