Infrared optical constants and band strengths of interstellar ice analogues: H2O:CO2 and H2O:CO2:CO mixtures at 10 K

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Table 2

Molecular mixing ratios; refractive indices at λ = 632.8 nm; n₆₃₃ densities, p; and estimated nominal mean densities, ρ_mn (see the text).

Experiment	Mixture	n₆₃₃	ρ(g/cm³)	ρ_nm (g/cm³)
H₂O	–	1.205 ± 0.005	0.63 ± 0.02 (*)
CO₂	–	1.235 ± 0.005	1.06 ± 0.03 (*)
CO	–	1.250 ± 0.005	0.91 ± 0.03 (*)
H₂O:CO₂	100:11	1.227 ± 0.005	0.75 ± 0.03	0.67
H₂O:CO₂	100:17	1.243 ± 0.005	0.82 ± 0.04	0.69
H₂O:CO₂	100:29	1.254 ± 0.005	0.92 ± 0.04	0.73
H₂O:CO₂	100:35	1.261 ± 0.005	0.96 ± 0.04	0.74
H₂O:CO₂	100:44	1.266± 0.005	0.99 ± 0.04	0.76
H₂O:CO₂	100:56	1.271 ± 0.005	1.02 ± 0.04	0.78
H₂O:CO₂:CO	100:19:20	1.265± 0.005	0.96 ± 0.04	0.73
H₂O:CO₂:CO	100:17:40	1.269± 0.005	0.98 ± 0.04	0.75
H₂O:CO₂:CO	100:26:21	1.270± 0.005	0.98 ± 0.04	0.75
H₂O:CO₂:CO	100:26:40	1.272± 0.005	1.00 ± 0.04	0.76
H₂O:CO₂:CO	100:35:21	1.273 ± 0.005	1.01 ± 0.04	0.76
H₂O:CO₂:CO	100:35:40	1.275± 0.005	1.01 ± 0.04	0.78
H₂O:CO₂:CO	100:44:20	1.277 ± 0.005	1.04 ± 0.04	0.78
H₂O:CO₂:CO	100:43:40	1.277± 0.005	1.03 ± 0.04	0.79
H₂O:CO₂:CO	100:56:42	1.281 ± 0.005	1.05 ± 0.04	0.81

Notes. ^(*)See Table 1.

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