Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...698.1903m&link_type=abstract
The Astrophysical Journal, Volume 698, Issue 2, pp. 1903-1906 (2009).
Astronomy and Astrophysics
Astronomy
Circumstellar Matter, Dust, Extinction, Infrared: Ism, Methods: Laboratory
Scientific paper
We carried out experiments of low-temperature infrared spectroscopy and transmission electron microscopy of enstatite (MgSiO3) synthesized by heating of amorphous magnesium silicate. There is a discrepancy between the infrared feature of enstatite obtained in this experiment and that of fine powdered single crystals. This reflects stacking disorder of enstatite. We show that circumstellar dust emission of enstatite is similar to the infrared feature measured in this experiment. This result strongly suggests that circumstellar enstatite has abundant stacking faults and is different from the single crystal.
Chihara Hiroyuki
Imai Yoshiki
Koike Chiyoe
Murata Keizo
Noguchi Takaaki
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