# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
# copyright and related rights waived via CC0 1.0

REFERENCES: |
    M. R. Querry. Optical constants, <a href="https://apps.dtic.mil/sti/citations/ADA158623"><i>Contractor Report</i> CRDC-CR-85034 (1985)</a>
COMMENTS: |
    90% Cu, 10% Zn.
DATA:
  - type: tabulated nk
    data: |
        0.2100 1.163 1.240
        0.2200 1.206 1.301
        0.2300 1.265 1.354
        0.2400 1.321 1.382
        0.2500 1.360 1.394
        0.2600 1.382 1.407
        0.2700 1.400 1.425
        0.2800 1.420 1.442
        0.2900 1.440 1.451
        0.3000 1.453 1.449
        0.3100 1.454 1.438
        0.3200 1.437 1.424
        0.3300 1.401 1.415
        0.3400 1.350 1.420
        0.3500 1.292 1.443
        0.3600 1.238 1.483
        0.3700 1.193 1.534
        0.3800 1.156 1.587
        0.3900 1.126 1.641
        0.4000 1.098 1.693
        0.4100 1.072 1.745
        0.4200 1.047 1.796
        0.4300 1.024 1.847
        0.4400 1.002 1.897
        0.4500 0.980 1.945
        0.4600 0.959 1.990
        0.4700 0.937 2.033
        0.4800 0.912 2.073
        0.4900 0.883 2.108
        0.5000 0.846 2.140
        0.5100 0.798 2.173
        0.5200 0.738 2.211
        0.5300 0.667 2.262
        0.5400 0.592 2.329
        0.5500 0.519 2.415
        0.5600 0.457 2.516
        0.5700 0.409 2.626
        0.5800 0.377 2.739
        0.5900 0.357 2.848
        0.6000 0.346 2.950
        0.6100 0.339 3.046
        0.6200 0.333 3.137
        0.6300 0.327 3.226
        0.6400 0.323 3.312
        0.6500 0.320 3.396
        0.6600 0.317 3.478
        0.6700 0.314 3.558
        0.6800 0.311 3.638
        0.6900 0.308 3.717
        0.7000 0.306 3.795
        0.7100 0.305 3.872
        0.7200 0.304 3.947
        0.7300 0.302 4.022
        0.7400 0.300 4.097
        0.7500 0.298 4.171
        0.7600 0.296 4.245
        0.7700 0.294 4.320
        0.7800 0.293 4.394
        0.7900 0.293 4.466
        0.8000 0.291 4.537
        0.8100 0.287 4.609
        0.8200 0.283 4.682
        0.8300 0.280 4.757
        0.8400 0.279 4.833
        0.8500 0.278 4.908
        0.8600 0.279 4.983
        0.8700 0.279 5.057
        0.8800 0.280 5.133
        0.8900 0.284 5.208
        0.9000 0.289 5.280
        0.9100 0.293 5.350
        0.9200 0.295 5.421
        0.9300 0.298 5.493
        0.9400 0.303 5.564
        0.9500 0.308 5.634
        0.9600 0.312 5.702
        0.9700 0.315 5.771
        0.9800 0.318 5.839
        0.9900 0.321 5.907
        1.0000 0.323 5.976
        1.0100 0.327 6.044
        1.0200 0.330 6.113
        1.0300 0.333 6.180
        1.0400 0.336 6.247
        1.0500 0.339 6.315
        1.0600 0.341 6.382
        1.0700 0.343 6.450
        1.0800 0.346 6.518
        1.0900 0.348 6.585
        1.1000 0.350 6.654
        1.1100 0.354 6.722
        1.1200 0.357 6.790
        1.1300 0.361 6.857
        1.1400 0.365 6.924
        1.1500 0.368 6.990
        1.1600 0.371 7.057
        1.1700 0.374 7.124
        1.1800 0.378 7.191
        1.1900 0.381 7.257
        1.2000 0.384 7.322
        1.2100 0.385 7.388
        1.2200 0.386 7.455
        1.2300 0.388 7.524
        1.2400 0.391 7.592
        1.2500 0.395 7.660
        1.2600 0.399 7.728
        1.2700 0.403 7.794
        1.2800 0.406 7.862
        1.2900 0.410 7.930
        1.3000 0.415 7.997
        1.3100 0.420 8.065
        1.3200 0.425 8.131
        1.3300 0.431 8.197
        1.3400 0.435 8.262
        1.3500 0.439 8.328
        1.3600 0.443 8.394
        1.3700 0.448 8.460
        1.3800 0.453 8.526
        1.3900 0.457 8.591
        1.4000 0.461 8.655
        1.4100 0.464 8.721
        1.4200 0.467 8.787
        1.4300 0.470 8.853
        1.4400 0.473 8.920
        1.4500 0.477 8.987
        1.4600 0.482 9.055
        1.4700 0.487 9.121
        1.4800 0.492 9.188
        1.4900 0.497 9.255
        1.5000 0.503 9.321
        1.5100 0.508 9.387
        1.5200 0.514 9.453
        1.5300 0.520 9.519
        1.5400 0.525 9.584
        1.5500 0.531 9.650
        1.5600 0.536 9.715
        1.5700 0.542 9.781
        1.5800 0.548 9.846
        1.5900 0.555 9.912
        1.6000 0.562 9.976
        1.6100 0.567 10.040
        1.6200 0.571 10.104
        1.6300 0.577 10.170
        1.6400 0.582 10.235
        1.6500 0.589 10.301
        1.6600 0.595 10.365
        1.6700 0.601 10.430
        1.6800 0.607 10.494
        1.6900 0.614 10.558
        1.7000 0.620 10.622
        1.7100 0.626 10.685
        1.7200 0.631 10.747
        1.7300 0.634 10.810
        1.7400 0.638 10.875
        1.7500 0.642 10.940
        1.7600 0.646 11.005
        1.7700 0.651 11.071
        1.7800 0.655 11.136
        1.7900 0.660 11.203
        1.8000 0.666 11.270
        1.8100 0.672 11.336
        1.8200 0.680 11.401
        1.8300 0.686 11.466
        1.8400 0.694 11.532
        1.8500 0.700 11.596
        1.8600 0.706 11.660
        1.8700 0.714 11.726
        1.8800 0.720 11.790
        1.8900 0.728 11.855
        1.9000 0.734 11.921
        1.9100 0.742 11.985
        1.9200 0.748 12.049
        1.9300 0.756 12.114
        1.9400 0.764 12.178
        1.9500 0.770 12.242
        1.9600 0.778 12.306
        1.9700 0.784 12.370
        1.9800 0.792 12.435
        1.9900 0.800 12.498
        2.0000 0.807 12.563
        2.0100 0.815 12.627
        2.0200 0.823 12.690
        2.0300 0.829 12.754
        2.0400 0.837 12.818
        2.0500 0.846 12.881
        2.0600 0.854 12.945
        2.0700 0.862 13.007
        2.0800 0.869 13.069
        2.0900 0.877 13.133
        2.1000 0.885 13.195
        2.1100 0.891 13.257
        2.1200 0.899 13.319
        2.1300 0.906 13.383
        2.1400 0.912 13.445
        2.1500 0.918 13.509
        2.1600 0.924 13.571
        2.1700 0.931 13.634
        2.1800 0.939 13.698
        2.1900 0.945 13.762
        2.2000 0.952 13.825
        2.2100 0.960 13.889
        2.2200 0.967 13.954
        2.2300 0.976 14.017
        2.2400 0.984 14.080
        2.2500 0.991 14.143
        2.2600 0.999 14.206
        2.2700 1.006 14.269
        2.2800 1.015 14.333
        2.2900 1.023 14.394
        2.3000 1.030 14.458
        2.3100 1.039 14.521
        2.3200 1.046 14.582
        2.3300 1.054 14.646
        2.3400 1.062 14.707
        2.3500 1.069 14.772
        2.3600 1.078 14.835
        2.3700 1.085 14.895
        2.3800 1.094 14.960
        2.3900 1.102 15.020
        2.4000 1.109 15.085
        2.4100 1.118 15.147
        2.4200 1.125 15.208
        2.4300 1.134 15.272
        2.4400 1.140 15.333
        2.4500 1.149 15.398
        2.4600 1.159 15.460
        2.4700 1.165 15.520
        2.4800 1.174 15.584
        2.4900 1.184 15.645
        2.5000 1.188 15.706
        2.5063 1.194 15.747
        2.5126 1.199 15.787
        2.5189 1.205 15.827
        2.5253 1.211 15.866
        2.5316 1.216 15.905
        2.5381 1.222 15.945
        2.5445 1.227 15.985
        2.5510 1.232 16.025
        2.5575 1.237 16.065
        2.5641 1.242 16.106
        2.5707 1.248 16.147
        2.5773 1.253 16.188
        2.5840 1.259 16.229
        2.5907 1.264 16.271
        2.5974 1.269 16.312
        2.6042 1.275 16.354
        2.6110 1.280 16.396
        2.6178 1.285 16.438
        2.6247 1.290 16.481
        2.6316 1.296 16.524
        2.6385 1.301 16.567
        2.6455 1.306 16.611
        2.6525 1.312 16.654
        2.6596 1.317 16.699
        2.6667 1.323 16.743
        2.6738 1.329 16.787
        2.6810 1.334 16.832
        2.6882 1.340 16.877
        2.6954 1.345 16.923
        2.7027 1.351 16.968
        2.7100 1.357 17.014
        2.7174 1.363 17.060
        2.7248 1.370 17.107
        2.7322 1.376 17.153
        2.7397 1.382 17.200
        2.7473 1.388 17.247
        2.7548 1.395 17.295
        2.7624 1.401 17.342
        2.7701 1.408 17.390
        2.7778 1.414 17.438
        2.7855 1.421 17.487
        2.7933 1.427 17.536
        2.8011 1.434 17.585
        2.8090 1.441 17.635
        2.8169 1.448 17.685
        2.8249 1.456 17.735
        2.8329 1.464 17.785
        2.8409 1.471 17.835
        2.8490 1.478 17.885
        2.8571 1.485 17.936
        2.8653 1.494 17.988
        2.8736 1.502 18.039
        2.8818 1.509 18.090
        2.8902 1.516 18.142
        2.8986 1.524 18.195
        2.9070 1.533 18.247
        2.9155 1.541 18.300
        2.9240 1.549 18.353
        2.9326 1.557 18.406
        2.9412 1.565 18.460
        2.9499 1.574 18.515
        2.9586 1.583 18.569
        2.9674 1.592 18.623
        2.9762 1.601 18.677
        2.9851 1.609 18.732
        2.9940 1.618 18.787
        3.0030 1.626 18.844
        3.0120 1.636 18.900
        3.0211 1.645 18.956
        3.0303 1.655 19.012
        3.0395 1.663 19.069
        3.0488 1.672 19.126
        3.0581 1.681 19.185
        3.0675 1.691 19.243
        3.0769 1.701 19.302
        3.0864 1.712 19.360
        3.0960 1.722 19.419
        3.1056 1.732 19.477
        3.1153 1.741 19.536
        3.1250 1.750 19.596
        3.1348 1.760 19.657
        3.1447 1.771 19.719
        3.1546 1.782 19.780
        3.1646 1.793 19.841
        3.1746 1.804 19.902
        3.1847 1.815 19.964
        3.1949 1.825 20.026
        3.2051 1.835 20.089
        3.2154 1.845 20.153
        3.2258 1.857 20.217
        3.2362 1.869 20.282
        3.2468 1.881 20.346
        3.2573 1.893 20.411
        3.2680 1.905 20.476
        3.2787 1.917 20.542
        3.2895 1.929 20.607
        3.3003 1.942 20.673
        3.3113 1.954 20.740
        3.3223 1.967 20.806
        3.3333 1.980 20.873
        3.3445 1.993 20.941
        3.3557 2.006 21.009
        3.3670 2.019 21.077
        3.3784 2.032 21.145
        3.3898 2.046 21.214
        3.4014 2.059 21.283
        3.4130 2.073 21.353
        3.4247 2.086 21.423
        3.4364 2.100 21.493
        3.4483 2.114 21.563
        3.4602 2.127 21.633
        3.4722 2.140 21.704
        3.4843 2.152 21.777
        3.4965 2.165 21.851
        3.5088 2.180 21.925
        3.5211 2.194 21.999
        3.5336 2.209 22.073
        3.5461 2.224 22.147
        3.5587 2.239 22.221
        3.5714 2.252 22.296
        3.5842 2.266 22.372
        3.5971 2.280 22.449
        3.6101 2.295 22.527
        3.6232 2.310 22.604
        3.6364 2.325 22.682
        3.6496 2.339 22.761
        3.6630 2.354 22.841
        3.6765 2.370 22.922
        3.6900 2.387 23.002
        3.7037 2.403 23.082
        3.7175 2.418 23.162
        3.7313 2.433 23.244
        3.7453 2.449 23.327
        3.7594 2.465 23.411
        3.7736 2.481 23.494
        3.7879 2.497 23.579
        3.8023 2.514 23.665
        3.8168 2.531 23.751
        3.8314 2.549 23.836
        3.8462 2.566 23.923
        3.8610 2.582 24.010
        3.8760 2.600 24.098
        3.8911 2.618 24.187
        3.9063 2.635 24.276
        3.9216 2.653 24.366
        3.9370 2.671 24.458
        3.9526 2.689 24.549
        3.9683 2.708 24.641
        3.9841 2.726 24.734
        4.0000 2.745 24.828
        4.0161 2.764 24.922
        4.0323 2.784 25.016
        4.0486 2.802 25.112
        4.0650 2.822 25.209
        4.0816 2.843 25.306
        4.0984 2.863 25.404
        4.1152 2.883 25.503
        4.1322 2.904 25.603
        4.1494 2.926 25.703
        4.1667 2.948 25.803
        4.1841 2.969 25.904
        4.2017 2.990 26.006
        4.2194 3.012 26.109
        4.2373 3.034 26.213
        4.2553 3.057 26.317
        4.2735 3.078 26.423
        4.2918 3.102 26.530
        4.3103 3.126 26.637
        4.3290 3.150 26.744
        4.3478 3.174 26.852
        4.3668 3.197 26.961
        4.3860 3.222 27.072
        4.4053 3.247 27.183
        4.4248 3.273 27.294
        4.4444 3.298 27.406
        4.4643 3.322 27.519
        4.4843 3.348 27.633
        4.5045 3.374 27.748
        4.5249 3.400 27.864
        4.5455 3.426 27.981
        4.5662 3.453 28.099
        4.5872 3.480 28.218
        4.6083 3.508 28.337
        4.6296 3.534 28.457
        4.6512 3.561 28.578
        4.6729 3.589 28.701
        4.6948 3.617 28.826
        4.7170 3.646 28.951
        4.7393 3.676 29.076
        4.7619 3.705 29.201
        4.7847 3.734 29.328
        4.8077 3.763 29.456
        4.8309 3.793 29.584
        4.8544 3.822 29.714
        4.8780 3.851 29.845
        4.9020 3.879 29.979
        4.9261 3.909 30.113
        4.9505 3.938 30.249
        4.9751 3.969 30.386
        5.0000 3.999 30.525
        5.0251 4.030 30.665
        5.0505 4.061 30.806
        5.0761 4.094 30.940
        5.1020 4.125 31.092
        5.1282 4.158 31.236
        5.1546 4.190 31.382
        5.1813 4.223 31.529
        5.2083 4.255 31.678
        5.2356 4.287 31.829
        5.2632 4.320 31.981
        5.2910 4.353 32.136
        5.3191 4.387 32.292
        5.3476 4.421 32.450
        5.3763 4.456 32.609
        5.4054 4.491 32.770
        5.4348 4.526 32.932
        5.4645 4.561 33.096
        5.4945 4.596 33.263
        5.5249 4.632 33.433
        5.5556 4.670 33.603
        5.5866 4.707 33.776
        5.6180 4.745 33.951
        5.6497 4.784 34.129
        5.6818 4.824 34.309
        5.7143 4.866 34.490
        5.7471 4.907 34.672
        5.7803 4.950 34.857
        5.8140 4.993 35.044
        5.8480 5.037 35.233
        5.8824 5.081 35.424
        5.9172 5.127 35.617
        5.9524 5.173 35.813
        5.9880 5.219 36.010
        6.0241 5.267 36.211
        6.0606 5.315 36.415
        6.0976 5.367 36.620
        6.1350 5.419 36.828
        6.1728 5.473 37.046
        6.2112 5.527 37.247
        6.2500 5.583 37.460
        6.2893 5.638 37.675
        6.3291 5.696 37.892
        6.3694 5.753 38.112
        6.4103 5.812 38.334
        6.4516 5.871 38.559
        6.4935 5.933 38.787
        6.5359 5.996 39.017
        6.5789 6.062 39.249
        6.6225 6.129 39.481
        6.6667 6.194 39.715
        6.7114 6.260 39.953
        6.7568 6.326 40.194
        6.8027 6.395 40.439
        6.8493 6.465 40.687
        6.8966 6.539 40.935
        6.9444 6.613 41.185
        6.9930 6.686 41.437
        7.0423 6.760 41.691
        7.0922 6.833 41.951
        7.1429 6.909 42.212
        7.1942 6.985 42.477
        7.2464 7.064 42.744
        7.2993 7.142 43.015
        7.3529 7.224 43.287
        7.4074 7.304 43.561
        7.4627 7.384 43.837
        7.5188 7.461 44.117
        7.5758 7.537 44.405
        7.6336 7.615 44.699
        7.6923 7.698 44.998
        7.7519 7.785 45.297
        7.8125 7.869 45.598
        7.8740 7.952 45.903
        7.9365 8.034 46.215
        8.0000 8.118 46.533
        8.0645 8.204 46.857
        8.1301 8.292 47.184
        8.1967 8.381 47.517
        8.2645 8.472 47.852
        8.3333 8.560 48.192
        8.4034 8.648 48.539
        8.4746 8.735 48.896
        8.5470 8.828 49.259
        8.6207 8.922 49.628
        8.6957 9.018 50.001
        8.7719 9.113 50.381
        8.8496 9.210 50.769
        8.9286 9.309 51.163
        9.0090 9.408 51.566
        9.0909 9.509 51.978
        9.1743 9.613 52.400
        9.2593 9.724 52.828
        9.3458 9.836 53.261
        9.4340 9.947 53.703
        9.5238 10.061 54.156
        9.6154 10.179 54.618
        9.7087 10.304 55.088
        9.8039 10.431 55.564
        9.9010 10.557 56.050
        10.0000 10.687 56.547
        10.1010 10.821 57.057
        10.2041 10.963 57.575
        10.3093 11.108 58.101
        10.4167 11.256 58.637
        10.5263 11.408 59.183
        10.6383 11.565 59.740
        10.7527 11.725 60.308
        10.8696 11.890 60.887
        10.9890 12.059 61.479
        11.1111 12.234 62.085
        11.2360 12.419 62.700
        11.3636 12.608 63.325
        11.4943 12.801 63.960
        11.6279 12.994 64.612
        11.7647 13.200 65.276
        11.9048 13.410 65.952
        12.0482 13.624 66.639
        12.1951 13.840 67.345
        12.3457 14.069 68.065
        12.5000 14.303 68.796
        12.6582 14.541 69.537
        12.8205 14.773 70.300
        12.9870 15.015 71.086
        13.1579 15.265 71.893
        13.3333 15.531 72.716
        13.5135 15.802 73.552
        13.6986 16.073 74.408
        13.8889 16.353 75.284
        14.0845 16.634 76.185
        14.2857 16.924 77.108
        14.4928 17.217 78.060
        14.7059 17.522 79.040
        14.9254 17.837 80.048
        15.1515 18.164 81.082
        15.3846 18.502 82.143
        15.6250 18.850 83.228
        15.8730 19.199 84.343
        16.1290 19.551 85.494
        16.3934 19.909 86.690
        16.6667 20.283 87.927
        16.9492 20.672 89.201
        17.2414 21.065 90.519
        17.5439 21.464 91.390
        17.8571 21.877 93.328
        18.1818 22.326 94.822
        18.5185 22.806 96.361
        18.8679 23.303 97.945
        19.2308 23.808 99.587
        19.6078 24.326 101.304
        20.0000 24.874 103.095
        20.4082 25.449 104.958
        20.8333 26.042 106.909
        21.2766 26.674 108.956
        21.7391 27.347 111.104
        22.2222 28.078 113.345
        22.7273 28.852 115.685
        23.2558 29.678 118.143
        23.8095 30.575 120.710
        24.3902 31.526 123.394
        25.0000 32.539 126.209
        25.6410 33.608 129.195
        26.3158 34.790 132.352
        27.0270 36.090 135.677
        27.7778 37.516 139.177
        28.5714 39.083 142.859
        29.4118 40.803 146.732
        30.3030 42.690 150.799
        31.2500 44.740 155.103
        32.2581 47.012 159.655
        33.3333 49.528 164.461
        34.4828 52.313 169.526
        35.7143 55.375 174.911
        37.0370 58.813 180.640
        38.4615 62.712 186.684
        40.0000 67.101 193.002
        41.6667 71.968 199.594
        43.4783 77.307 206.593
        45.4545 83.297 214.045
        47.6190 90.071 222.012
        50.0000 97.835 230.346
        52.6316 106.633 239.428
        55.5556 117.163 248.501