Frequency in Ar (cm-1) Relative Intensity Absolute Intensity, A (cm/molecule) 639.60 0.21 3.0e-18 863.60 0.44 6.1e-18 1140.2 0.39 5.5e-18 1216.7 0.033 4.6e-19 1223.4 0.3 4.1e-18 1311.9 0.14 1.9e-18 1324.4 0.74 1.0e-17 1331.9 0.17 2.3e-18 1350.2 0.15 2.1e-18 1369.0 0.62 8.6e-18 1388.3 0.032 4.4e-19 1401.3 0.83 1.2e-17 1408.8 0.046 6.4e-19 1429.4 0.096 1.3e-18 1538.6 0.018 2.5e-19 1550.1 0.22 3.1e-18 1578.2 1 1.4e-17