Infrared spectra of hydrated silicates, carbonaceous chondrites, and amorphous carbonates compared with interstellar dust absorptions
Abstract
The infrared spectra of C1 and C2 carbonaceous chondrites are similar but not identical to the serpentines, montmorillonites, and chamosites. Hydroxyl or bound water features at 2.7, 2.9 and 6 microns do not change at temperatures from 15 to 300 K; absorption bands at 2.7 and near 2.8 microns can be applied for the determination of a hydrated silicate component in the interstellar dust. The interstellar 3.07-micron band is a broad feature between the 3.1 and 4 micron lines in hydrated silicates; a band at 7 microns in carbonaceous chondrites is probably a carbonate absorption. Finally, an amorphous calcite was produced to investigate order-disorder effects on the infrared carbonate spectra and its spectrum compared with crystalline carbonates.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1980
- Bibcode:
- 1980A&A....92..281K
- Keywords:
-
- Absorption Spectra;
- Carbonaceous Chondrites;
- Carbonates;
- Cosmic Dust;
- Infrared Spectra;
- Interstellar Matter;
- Silicates;
- Amorphous Materials;
- Hydroxyl Radicals;
- Infrared Absorption;
- Interstellar Radiation;
- Spectrum Analysis;
- Water Vapor;
- Astrophysics