Refractive indicies from Mukai and Kratschmer, Earth, Moon, and Planets, 1986.
Water ice (amorphous, Ia) at 23 K

 
 
 
Wavelength (microns) 	 real  imaginary
2.50000  1.245  4.0e-6
2.56410  1.241  1.0e-4
2.63158  1.221  4.0e-4
2.70270  1.188  0.004
2.77778  1.126  0.023
2.81690  1.082  0.056
2.85714  1.034  0.123
2.89855  1.024  0.236
2.94118  1.082  0.344
2.97619  1.157  0.405
2.99401  1.197  0.428
3.01205  1.241  0.447
3.03030  1.290  0.461
3.07692  1.429  0.454
3.12500  1.557  0.380
3.14465  1.595  0.340
3.18471  1.636  0.236
3.22581  1.630  0.138
3.25203  1.606  0.077
3.27869  1.570  0.045
3.33333  1.510  0.016
3.38983  1.473  0.007
3.44828  1.447  0.004
3.50877  1.430  0.003
3.57143  1.414  0.002
3.63636  1.403  0.003
3.70370  1.392  0.003
3.84615  1.376  0.005
4.16667  1.356  0.010
4.34783  1.348  0.017  
4.54545  1.352  0.023
4.76190  1.349  0.014
5.00000  1.340  0.010
5.26316  1.326  0.009
5.55556  1.303  0.016
5.88235  1.290  0.068
5.97015  1.308  0.079
6.06061  1.326  0.077
6.25000  1.337  0.060
6.66667  1.335  0.048
7.14286  1.331  0.043
7.69231  1.321  0.036
8.33333  1.303  0.032
8.69565  1.289  0.032
9.09091  1.272  0.033
9.52381  1.245  0.035
10.0000  1.201  0.041
10.5263  1.128  0.097
11.1111  1.114  0.218
11.7647  1.172  0.322
12.5000  1.274  0.395
13.3333  1.393  0.404
14.2857  1.487  0.362
15.3846  1.517  0.279