Optical constants of refractory oxides at high temperatures - Mid-infrared properties of corundum, spinel, and α-quartz, potential carriers of the 13 μm feature

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Table 8

Comparison of the properties of the observed 13 μm band profile with those of spinel and corundum at different temperatures, according to our new in situ high temperature optical constants.

Substance	λ_peak	FWHM	Comments
or spectrum	[μm]	[μm]

Mean ISO-SWS	13.00	0.45
V376 Aur, Spitzer-IRS	13.07	0.60
corundum, spher., 300 K	12.73	0.26	+ shoulder
			at 13.2 μm
corundum, spher., 551 K	12.82	0.35
corundum, spher., 738 K	12.87	0.50
corundum, spher., 928 K	12.94	0.73
corundum, obl., 300 K	12.92	0.27
corundum, obl., 551 K	13.00	0.37
corundum, obl., 738 K	13.07	0.46
spinel, spher., 300 K	13.17	0.53
spinel, spher., 551 K	13.35	0.72
spinel, spher., 738 K	13.44	0.97
spinel, spher., 928 K	13.53	1.37

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