This data was collected and compiled at the NASA/Ames Research Center, Moffett Field, CA.  Any use of this data should recognize the parent publication: 

"The 2140 cm-1 (4.673 microns) Solid CO Band: The Case for Interstellar O2 and N2 and the Photochemistry of Nonpolar Interstellar Ice Analogs", Jamie Elsila, Louis J. Allamandola, and Scott A. Sandford, THE ASTROPHYSICAL JOURNAL, Vol. 479, pages 818-838 (1997 April 20)


CO2:CO = 20:1
(no = 1.22)
(d = 1.65x10-6 cm)

FREQUENCY	n	k
(cm-1)

2057.7	1.3035	0.0000
2065.5	1.3051	0.0001
2073.2	1.3059	0.0001
2080.9	1.3074	0.0003
2088.6	1.3097	0.0000
2096.3	1.3118	0.0000
2098.7	1.3126	0.0000
2101.1	1.3136	0.0000
2103.6	1.3144	0.0000
2106.0	1.3153	0.0000
2108.4	1.3163	0.0000
2110.8	1.3174	0.0002
2113.2	1.3185	0.0005
2115.6	1.3194	0.0010
2116.6	1.3197	0.0003
2117.5	1.3205	0.0000
2118.5	1.3214	0.0005
2119.5	1.3216	0.0007
2120.4	1.3221	0.0004
2121.4	1.3228	0.0005
2122.4	1.3234	0.0003
2123.3	1.3243	0.0002
2124.3	1.3252	0.0002
2125.2	1.3261	0.0002
2126.2	1.3271	0.0002
2127.2	1.3284	0.0004
2128.1	1.3295	0.0003
2129.1	1.3311	0.0007
2130.1	1.3226	0.0009
2130.6	1.3337	0.0009
2131.0	1.3344	0.0011
2131.5	1.3356	0.0015
2132.0	1.3367	0.0020
2132.5	1.3379	0.0024
2133.0	1.3394	0.0030
2133.4	1.3399	0.0035
2133.9	1.3417	0.0041
2134.4	1.3434	0.0051
2134.9	1.3451	0.0063
2135.4	1.3470	0.0078
2135.9	1.3497	0.0096
2136.3	1.3505	0.0125
2136.8	1.3525	0.0156
2137.3	1.3539	0.0194
2137.8	1.3549	0.0243
2138.3	1.3558	0.0291
2138.7	1.3541	0.0385
2139.2	1.3503	0.0453
2139.7	1.3435	0.0510
2140.2	1.3359	0.0529
2140.7	1.3286	0.0521
2141.2	1.3254	0.0464
2141.6	1.3200	0.0497
2142.1	1.3179	0.0455
2142.6	1.3149	0.0436
2143.1	1.3121	0.0417
2143.6	1.3089	0.0398
2144.1	1.3072	0.0342
2144.5	1.3061	0.0352
2145.0	1.3055	0.0314
2145.5	1.3047	0.0290
2146.0	1.3038	0.0271
2146.5	1.3037	0.0237
2146.9	1.3037	0.0232
2147.4	1.3036	0.0203
2147.9	1.3039	0.0187
2148.4	1.3041	0.0173
2148.9	1.3041	0.0158
2149.4	1.3046	0.0134
2149.8	1.3051	0.0123
2150.3	1.3060	0.0106
2150.8	1.3068	0.0097
2151.3	1.3073	0.0089
2151.8	1.3080	0.0076
2152.2	1.3084	0.0066
2152.7	1.3093	0.0054
2153.2	1.3102	0.0042
2153.7	1.3112	0.0032
2154.2	1.3125	0.0022
2154.7	1.3139	0.0017
2155.1	1.3146	0.0013
2156.1	1.3170	0.0009
2157.1	1.3185	0.0011
2158.0	1.3197	0.0002
2159.0	1.3217	0.0003
2160.0	1.3230	0.0003
2160.9	1.3241	0.0004
2161.9	1.3252	0.0003
2162.9	1.3263	0.0000
2163.8	1.3276	0.0002
2164.8	1.3284	0.0005
2165.7	1.3293	0.0001
2166.7	1.3305	0.0004
2167.7	1.3313	0.0004
2168.6	1.3322	0.0004
2169.6	1.3329	0.0005
2172.0	1.3355	0.0003
2174.4	1.3374	0.0004
2176.8	1.3396	0.0003
2179.2	1.3420	0.0000
2181.7	1.3445	0.0003
2184.1	1.3467	0.0004
2186.5	1.3492	0.0000
2188.9	1.3519	0.0002
2191.3	1.3543	0.0000
2193.7	1.3572	0.0001
2196.1	1.3599	0.0003
2204.3	1.3691	0.0000
2211.5	1.3790	0.0002
2219.7	1.3912	0.0005
2227.9	1.4057	0.0000
2236.1	1.4212	0.0004