From Roush et al. (2007) gypsum Intial results using Shkuratov to Model RELAB data Frequency Imaginary (cm-1) Index 16666.7000 3.8053e-7 16806.7000 3.8066e-7 16949.2000 3.8635e-7 17094.0000 3.9108e-7 17241.4000 3.9757e-7 17391.3000 4.0359e-7 17543.9000 4.1380e-7 17699.1000 4.2668e-7 17857.1000 4.3426e-7 18018.0000 4.4351e-7 18181.8000 4.5475e-7 18348.6000 4.6470e-7 18518.5000 4.7459e-7 18691.6000 4.8022e-7 18867.9000 4.9526e-7 19047.6000 5.0046e-7 19230.8000 5.1973e-7 19417.5000 5.2704e-7 19607.8000 5.5431e-7 19802.0000 5.5949e-7 20000.0000 5.8227e-7 20202.0000 5.8670e-7 20408.2000 6.0722e-7 20618.6000 6.3346e-7 20833.3000 6.5285e-7 21052.6000 6.7007e-7 21276.6000 6.8262e-7 21505.4000 6.9732e-7 21739.1000 7.1803e-7 21978.0000 7.3581e-7 22222.2000 7.5539e-7 22471.9000 7.8252e-7 22727.3000 8.0813e-7 22988.5000 8.3273e-7 23255.8000 8.6471e-7 23529.4000 8.9808e-7 23809.5000 9.3900e-7 24096.4000 9.6293e-7 24390.2000 9.9163e-7 24691.4000 1.0209e-6 25000.0000 1.0553e-6 25316.5000 1.0833e-6 25641.0000 1.1119e-6 25974.0000 1.1322e-6 26315.8000 1.1773e-6 26666.7000 1.2209e-6 27027.0000 1.2601e-6 27397.3000 1.3026e-6 27777.8000 1.3444e-6 28169.0000 1.3851e-6 28571.4000 1.4405e-6 28985.5000 1.4812e-6 29411.8000 1.5159e-6 29850.7000 1.5490e-6 30303.0000 1.6048e-6 30769.2000 1.6614e-6 31250.0000 1.7314e-6 31746.0000 1.7526e-6 32258.1000 1.8108e-6 32786.9000 1.8399e-6 33333.3000 1.8290e-6