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Table 4.

Cross section and half-life times.

Formamide adsorbed by antigorite
Peak (cm−1) Mode σ (cm2) t1/2 (min)
3350–3166 νas, s NH2 (1, 9 ± 0.6) × 10−20 24 ± 4
2891 ν CH (1.5 ± 0.9) × 10−20 30 ± 13
2473 ν CO (1.7 ± 0.8) × 10−20 27 ± 8
2329 ν CO (1.5 ± 0.5) × 10−20 30 ± 5
1750 ν CO (1.2 ± 0.8) × 10−20 39 ± 19
Formamide adsorbed by TiO2
Peak (cm−1) Mode σ (cm2) t1/2 (min)
3298–3166 νas, s NH2 (1.14 ± 0.64) × 10−19 4 ± 2
2891 ν CH (0.5 ± 0.2) × 10−19 9 ± 2
Formamide adsorbed by spinel
Peak (cm−1) Mode σ (cm2) t1/2 (min)
2348 νas CO2 (2.1 ± 0.3) × 10−19 2.273 ± 0.007
2323 ν CO (3.7 ± 0.6) × 10−19 1.2467 ± 0.0002
Formamide adsorbed by forsterite
Peak (cm−1) Mode σ (cm2) t1/2 (min)
2815 ... (1.0 ± 0.8) × 10−20 46 ± 31
2771 ν CH (1 ± 2) × 10−20 35 ± 35
2474 ν CO (1.0 ± 0.7) × 10−20 46 ± 25

Notes. For bands reported in Table 3 that showed variations during the irradiation experiment. The cross section σ (third column) and half-lifetime t1/2 (fourth column) were evaluated through the Eq. (3) and 2 respectively.

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