Abstract
Infrared spectra of submicrometre-sized particles of several protosilicates have been used to derive mass absorption coefficients. These data have been applied in order to describe the infrared radiation from the source OH 26.5+0.6 in terms of a simple model. A good fit of the 10 μm absorption feature could be achieved, but some discrepancies remain in the 20 μm region. The reasons for the weakness of the 20 μm band in infrared sources are discussed.
The laboratory spectra revealed that the samples contained a small admixture of carbonates. Thus, some statements about the infrared spectrum of submicrometre-sized carbonate particles could also be made.
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Dorschner, J., Friedemann, C., Gürtler, J. et al. Laboratory spectra of protosilicates and the interstellar silicate absorption bands. Astrophys Space Sci 68, 159–174 (1980). https://doi.org/10.1007/BF00641652
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DOI: https://doi.org/10.1007/BF00641652