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Table 1.

Correction factors for lower and upper limit absorption and applied to the transmission spectra (Eq. (2)), maximum error values Δα, and usable range of the linear absorption coefficient α for the individual measurements of forsterite (F[100], F[010], F[001]) and enstatite (EB[xx0], EB[001], EK[100], EK[010]).

Sample d Δα α-range
(mm) (cm−1) (cm−1)
F[100] 10 1.17 0.784 0.4 (0.1) 0.05−4
F[010] 10 0.83 0.556 0.4 (0.1) 0.05−4
F[001] 10 1.50 1.0 0.4 (0.1) 0.05−4
EB[xx0] 4.0 1.0 0.8 0.56 0.12−10
EB[001] 5.0 0.83 0.66 0.45 0.1−8
EK[100] 0.6 1.07 0.96 1.7 0.85−65
EK[010] 0.6 1.0 0.9 1.7 0.85−65

Notes. The smaller Δα value for forsterite given in parentheses applies after taking physical arguments into consideration (Sect. 3.4). The sample thickness d entering in Eq. (2) is also given.

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