Forsterite reflection spectra in low temperature
Abstract
The infrared reflectivities of single crystalline forsterite (Mg2SiO4) were measured for the temperature range 300-50K for each crystal axis, between wavenumber 5000-100 cm-1 (wavelength: 2-100 μm). The spectra show significant dependence of temperature, most of the bands becomes more intense, sharper, and their peak positions shift to higher wavenumber with temperature decreased. Reflection spectra were fitted with dispersion formula of damped oscillator model to derive the oscillator parameters that are handy and useful in assessing optical constants of forsterite in low temperature. The absorption spectra of forsterite powder are calculated for spherical shape, CDE, and hollow-sphere shape distributions under Rayleigh approximation to predict emission spectra in low temperature environment.
- Publication:
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ESA Special Publication
- Pub Date:
- January 2005
- Bibcode:
- 2005ESASP.577..417S
- Keywords:
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- Interstellar Dust