EXTINCTION OF OLIVINE AND PYROXENE IN THE MIDINFRARED AND FAR-INFRARED

Authors
KOIKE C SHIBAI H TUCHIYAMA A
Citation
C. Koike et al., EXTINCTION OF OLIVINE AND PYROXENE IN THE MIDINFRARED AND FAR-INFRARED, Monthly Notices of the Royal Astronomical Society, 264(3), 1993, pp. 654-658
Citations number
13
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Monthly Notices of the Royal Astronomical Society → ACNP
ISSN journal
00358711
Volume
264
Issue
3
Year of publication
1993
Pages
654 - 658
Database
ISI
SICI code
0035-8711(1993)264:3<654:EOOAPI>2.0.ZU;2-3
Abstract
The extinction coefficients Q(ext)/a of orthopyroxene, clinopyroxene, Fo100, Fo90, Fo80, Fo60, Fo40 and the Allende meteorite have been obta ined in the mid- and far-infrared ranges. These crystalline silicates have many absorption peaks. The main peaks in forsterite at 10, 11, 20 , 24, 34, 50 and 70 mum shift to longer wavelength and weaken as the M g/(Mg + Fe) ratio decreases. We discuss the composition of cometary du st grains in relation to our data.