Al2O3 (corundum - rubies, sapphires) 
Original form Koike et al. (1995)
Compiled by H. R. Wakeford 2013
Citation for use this data: Wakeford & Sing (2015) 

wavelength		n			k
0.335 1.550   1.63E-02
0.405 1.580   5.94E-02
0.455 1.560   4.35E-02
0.5	1.550	1.50E-02
0.502 1.550   1.50E-02
0.547 1.555   1.45E-02
0.555 1.557   1.42E-02
0.6	1.560	1.40E-02
0.605 1.560   1.40E-02
0.655 1.560   1.37E-02
0.7	1.560	1.25E-02
0.705 1.560   1.35E-02
0.760 1.560   1.40E-02
0.8	1.560	1.11E-02
0.820 1.560   1.30E-02
0.9	1.560	9.86E-03
0.940 1.560   1.35E-02 
1.0	1.560	8.88E-03
1.163 1.560   1.30E-02
1.215 1.560   1.30E-02 
1.267 1.560   1.35E-02 
1.319 1.560   1.35E-02 
1.371 1.560   1.35E-02 
1.423 1.560   1.25E-02 
1.475 1.560   1.11E-02 
1.527 1.560   1.11E-02 
1.579 1.560   9.86E-03 
1.631 1.550   8.88E-03
2.0	1.550	4.92E-03
3.0	1.530	5.12E-03
3.599 1.530   5.12E-03 
4.0	1.500	7.44E-03
4.500 1.500   7.44E-03
5.0	1.460	1.14E-02
6.0	1.410	1.83E-02
7.0	1.330	3.05E-02
8.0	1.230	5.23E-02
9.0	1.090	9.44E-02
10.0	0.880	1.95E-01
10.1	0.852	2.13E-01
10.2	0.823	2.34E-01
10.3	0.793	2.57E-01
10.4	0.763	2.85E-01
10.5	0.731	3.16E-01
10.6	0.700	3.53E-01
10.7	0.670	3.95E-01
10.8	0.643	4.43E-01
10.9	0.619	4.97E-01
11.0	0.601	5.56E-01
11.1	0.590	6.20E-01
11.2	0.586	6.86E-01
11.3	0.591	7.56E-01
11.4	0.607	8.25E-01
11.5	0.633	8.94E-01
11.6	0.672	9.58E-01
11.7	0.723	1.01E+00
11.8	0.785	1.05E+00
11.9	0.849	1.07E+00
12.0	0.905	1.07E+00
12.1	0.942	1.05E+00
12.2	0.957	1.04E+00
12.3	0.955	1.03E+00
12.4	0.948	1.04E+00
12.5	0.945	1.07E+00
12.6	0.953	1.11E+00
12.7	0.977	1.14E+00
12.8	1.020	1.18E+00
12.9	1.060	1.19E+00
13.0	1.110	1.19E+00
13.1	1.140	1.17E+00
13.2	1.150	1.15E+00
13.3	1.150	1.14E+00
13.4	1.140	1.14E+00
13.5	1.130	1.15E+00
13.6	1.130	1.17E+00
13.7	1.130	1.19E+00
13.8	1.140	1.21E+00
13.9	1.150	1.24E+00
14.0	1.170	1.26E+00
14.1	1.200	1.28E+00
14.2	1.220	1.30E+00
14.3	1.250	1.31E+00
14.4	1.280	1.31E+00
14.5	1.300	1.31E+00
14.6	1.330	1.31E+00
14.7	1.350	1.30E+00
14.8	1.370	1.29E+00
14.9	1.380	1.28E+00
15.0	1.390	1.27E+00
15.1	1.390	1.26E+00
15.2	1.400	1.25E+00
15.3	1.390	1.24E+00
15.4	1.390	1.24E+00
15.5	1.380	1.24E+00
15.6	1.370	1.24E+00
15.7	1.360	1.24E+00
15.8	1.350	1.25E+00
15.9	1.340	1.26E+00
16.0	1.330	1.27E+00
16.1	1.320	1.29E+00
16.2	1.310	1.31E+00
16.3	1.300	1.33E+00
16.4	1.300	1.35E+00
16.5	1.290	1.38E+00
16.6	1.290	1.40E+00
16.7	1.290	1.43E+00
16.8	1.300	1.46E+00
16.9	1.300	1.48E+00
17.0	1.310	1.51E+00
17.1	1.310	1.54E+00
17.2	1.320	1.57E+00
17.3	1.330	1.59E+00
17.4	1.340	1.62E+00
17.5	1.360	1.65E+00
17.6	1.370	1.68E+00
17.7	1.390	1.71E+00
17.8	1.400	1.73E+00
17.9	1.420	1.76E+00
18.0	1.440	1.79E+00
18.1	1.460	1.82E+00
18.2	1.480	1.85E+00
18.3	1.510	1.88E+00
18.4	1.530	1.91E+00
18.5	1.560	1.93E+00
18.6	1.590	1.96E+00
18.7	1.620	1.99E+00
18.8	1.660	2.02E+00
18.9	1.700	2.04E+00
19.0	1.740	2.06E+00
19.1	1.780	2.09E+00
19.2	1.820	2.11E+00
19.3	1.870	2.12E+00
19.4	1.920	2.14E+00
19.5	1.970	2.15E+00
19.6	2.020	2.16E+00
19.7	2.070	2.17E+00
19.8	2.120	2.17E+00
19.9	2.180	2.17E+00
20.0	2.230	2.16E+00
20.1	2.280	2.15E+00
20.2	2.330	2.14E+00
20.3	2.380	2.12E+00
20.4	2.430	2.10E+00
20.5	2.480	2.08E+00
20.6	2.520	2.05E+00
20.7	2.560	2.02E+00
20.8	2.600	1.99E+00
20.9	2.640	1.95E+00
21.0	2.670	1.92E+00
21.1	2.700	1.88E+00
21.2	2.720	1.85E+00
21.3	2.740	1.81E+00
21.4	2.760	1.77E+00
21.5	2.770	1.74E+00
21.6	2.780	1.70E+00
21.7	2.790	1.67E+00
21.8	2.800	1.63E+00
21.9	2.810	1.60E+00
22.0	2.810	1.57E+00
22.1	2.810	1.54E+00
22.2	2.810	1.52E+00
22.3	2.810	1.49E+00
22.4	2.800	1.47E+00
22.5	2.800	1.44E+00
22.6	2.790	1.42E+00
22.7	2.790	1.40E+00
22.8	2.780	1.38E+00
22.9	2.770	1.37E+00
23.0	2.770	1.35E+00
23.1	2.770	1.34E+00
23.2	2.760	1.32E+00
23.3	2.750	1.31E+00
23.4	2.750	1.30E+00
23.5	2.740	1.29E+00
23.6	2.730	1.28E+00
23.7	2.730	1.27E+00
23.8	2.720	1.27E+00
23.9	2.710	1.26E+00
24.0	2.710	1.26E+00
24.1	2.700	1.25E+00
24.2	2.700	1.25E+00
24.3	2.690	1.24E+00
24.4	2.690	1.24E+00
24.5	2.680	1.24E+00
24.6	2.680	1.24E+00
24.7	2.680	1.24E+00
24.8	2.680	1.24E+00
24.9	2.670	1.24E+00
25.0	2.670	1.24E+00
25.1	2.670	1.24E+00
25.2	2.670	1.24E+00
25.3	2.670	1.24E+00
25.4	2.670	1.24E+00
25.5	2.670	1.24E+00
25.6	2.670	1.24E+00
25.7	2.670	1.24E+00
25.8	2.670	1.24E+00
25.9	2.680	1.25E+00
26.0	2.680	1.25E+00
26.1	2.680	1.25E+00
26.2	2.680	1.25E+00
26.3	2.690	1.25E+00
26.4	2.690	1.25E+00
26.5	2.690	1.26E+00
26.6	2.700	1.26E+00
26.7	2.700	1.26E+00
26.8	2.710	1.26E+00
26.9	2.710	1.26E+00
27.0	2.720	1.26E+00
27.1	2.730	1.26E+00
27.2	2.730	1.26E+00
27.3	2.740	1.26E+00
27.4	2.740	1.27E+00
27.5	2.750	1.27E+00
27.6	2.760	1.27E+00
27.7	2.760	1.27E+00
27.8	2.770	1.27E+00
27.9	2.780	1.27E+00
28.0	2.790	1.26E+00
28.1	2.790	1.26E+00
28.2	2.800	1.26E+00
28.3	2.810	1.26E+00
28.4	2.820	1.26E+00
28.5	2.820	1.26E+00
28.6	2.830	1.26E+00
28.7	2.840	1.25E+00
28.8	2.850	1.25E+00
28.9	2.860	1.25E+00
29.0	2.860	1.25E+00
29.1	2.870	1.24E+00
29.2	2.880	1.24E+00
29.3	2.890	1.24E+00
29.4	2.890	1.23E+00
29.5	2.900	1.23E+00
29.6	2.910	1.22E+00
29.7	2.920	1.22E+00
29.8	2.920	1.22E+00
29.9	2.930	1.22E+00
30.0	2.940	1.21E+00
30.5	2.980	1.19E+00
31.0	3.010	1.16E+00
31.5	3.040	1.13E+00
32.0	3.070	1.10E+00
32.5	3.090	1.07E+00
33.0	3.110	1.03E+00
34.0	3.140	9.69E-01
35.0	3.160	9.05E-01
36.0	3.180	8.45E-01
37.0	3.180	7.90E-01
38.0	3.190	7.39E-01
39.0	3.180	6.93E-01
40.0	3.180	6.51E-01
41.0	3.170	6.14E-01
42.0	3.170	5.80E-01
43.0	3.160	5.50E-01
44.0	3.150	5.22E-01
45.0	3.140	4.97E-01
46.0	3.130	4.75E-01
47.0	3.120	4.55E-01
48.0	3.110	4.36E-01
49.0	3.110	4.19E-01
50.0	3.100	4.04E-01
55.0	3.060	3.45E-01
60.0	3.030	3.08E-01
65.0	3.000	2.85E-01
70.0	2.990	2.73E-01
75.0	2.980	2.64E-01
80.0	2.980	2.55E-01
85.0	2.990	2.43E-01
90.0	2.990	2.28E-01
95.0	2.990	2.14E-01
100.0	2.990	2.00E-01
110.0	2.980	1.80E-01
120.0	2.970	1.67E-01
130.0	2.960	1.60E-01
140.0	2.950	1.57E-01
150.0	2.950	1.58E-01