Table 3
Value of the spectral index β derived on different spectral ranges from the experimental MAC spectra for the studied amorphous samples.
| Sample | Spectral domain (μm)(1) | β (10 K) | β (30 K) | β (100 K) | β (200 K) | β (300 K) |
|
|
||||||
| F1 (Mg2.3SiO4) | 130–690/710 | 2.1 | 2.1 | 2.0 | 1.8 | 1.6 |
| 690/710–1200 | 3.6 | 3.8 | 3.4 | 3.2 | 2.2 | |
| F2 (Mg2.8SiO4) | 170–770/800 | 2.1 | 2.2 | 2.1 | 2.0 | 1.8 |
| 770/800–1000 | 3.2 | 3.2 | 2.9 | 3.0 | 2.5 | |
| F3 (Mg2.05SiO4) | 150–550/650 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 |
| 550/650–1200 | 4.5 | 4.5 | 3.4 | 3.0 | 2.5 | |
| E (Mg0.95SiO3) | 150–420/590 | 2.5 | 2.2 | 2.1 | 2.0 | 1.7 |
| 420/550–800 | 1.7 | 1.5 | 1.5 | 1.4 | 1.3 | |
| 800–1500 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | |
| D (Ca0.98Mg0.9Si2O6) | 150–450 | 2.0 | 2.1 | 2.0 | 1.9 | 1.8 |
| 450–650 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | |
| 650–1000 | 0.8 | 0.7 | 0.6 | 0.6 | 0.9 | |
Notes.
The number of spectral domains on which a spectral index, β, may be defined depends on the samples. In addition, for a given sample, the spectral domains may vary with the grain temperature. When two values of the wavelength separating the spectral domains are given, the first one corresponds to the highest temperature (300 K) and the second one to the lowest temperature (10 K), see text.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.