# 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: |
    85% Cu, 15% Zn.
DATA:
  - type: tabulated nk
    data: |
        0.2100 1.094 1.089
        0.2200 1.121 1.152
        0.2300 1.164 1.209
        0.2400 1.206 1.242
        0.2500 1.231 1.263
        0.2600 1.242 1.288
        0.2700 1.249 1.322
        0.2800 1.263 1.361
        0.2900 1.283 1.394
        0.3000 1.305 1.420
        0.3100 1.325 1.438
        0.3200 1.341 1.449
        0.3300 1.351 1.454
        0.3400 1.355 1.451
        0.3500 1.347 1.442
        0.3600 1.322 1.433
        0.3700 1.284 1.431
        0.3800 1.237 1.440
        0.3900 1.184 1.460
        0.4000 1.131 1.493
        0.4100 1.083 1.534
        0.4200 1.039 1.581
        0.4300 0.999 1.630
        0.4400 0.963 1.680
        0.4500 0.929 1.729
        0.4600 0.895 1.778
        0.4700 0.860 1.825
        0.4800 0.824 1.873
        0.4900 0.783 1.920
        0.5000 0.737 1.970
        0.5100 0.687 2.027
        0.5200 0.634 2.092
        0.5300 0.583 2.167
        0.5400 0.538 2.250
        0.5500 0.500 2.337
        0.5600 0.468 2.427
        0.5700 0.441 2.520
        0.5800 0.422 2.614
        0.5900 0.412 2.706
        0.6000 0.405 2.792
        0.6100 0.400 2.875
        0.6200 0.397 2.956
        0.6300 0.393 3.034
        0.6400 0.391 3.111
        0.6500 0.390 3.187
        0.6600 0.388 3.261
        0.6700 0.387 3.334
        0.6800 0.386 3.407
        0.6900 0.385 3.479
        0.7000 0.386 3.550
        0.7100 0.386 3.620
        0.7200 0.386 3.689
        0.7300 0.386 3.759
        0.7400 0.387 3.827
        0.7500 0.386 3.894
        0.7600 0.386 3.963
        0.7700 0.387 4.032
        0.7800 0.388 4.101
        0.7900 0.390 4.168
        0.8000 0.392 4.235
        0.8100 0.394 4.301
        0.8200 0.394 4.366
        0.8300 0.393 4.433
        0.8400 0.394 4.501
        0.8500 0.396 4.570
        0.8600 0.400 4.638
        0.8700 0.403 4.704
        0.8800 0.406 4.772
        0.8900 0.412 4.839
        0.9000 0.418 4.904
        0.9100 0.423 4.968
        0.9200 0.426 5.033
        0.9300 0.432 5.099
        0.9400 0.438 5.163
        0.9500 0.444 5.226
        0.9600 0.450 5.289
        0.9700 0.455 5.352
        0.9800 0.461 5.414
        0.9900 0.467 5.475
        1.0000 0.471 5.536
        1.0100 0.476 5.597
        1.0200 0.481 5.659
        1.0300 0.485 5.719
        1.0400 0.488 5.781
        1.0500 0.493 5.842
        1.0600 0.497 5.904
        1.0700 0.501 5.966
        1.0800 0.505 6.027
        1.0900 0.509 6.089
        1.1000 0.514 6.151
        1.1100 0.519 6.213
        1.1200 0.525 6.274
        1.1300 0.531 6.335
        1.1400 0.536 6.395
        1.1500 0.540 6.454
        1.1600 0.544 6.515
        1.1700 0.548 6.578
        1.1800 0.553 6.639
        1.1900 0.560 6.700
        1.2000 0.567 6.760
        1.2100 0.572 6.818
        1.2200 0.575 6.878
        1.2300 0.578 6.939
        1.2400 0.584 7.001
        1.2500 0.589 7.062
        1.2600 0.596 7.122
        1.2700 0.601 7.182
        1.2800 0.606 7.242
        1.2900 0.611 7.303
        1.3000 0.617 7.365
        1.3100 0.625 7.426
        1.3200 0.633 7.485
        1.3300 0.641 7.543
        1.3400 0.647 7.600
        1.3500 0.652 7.658
        1.3600 0.657 7.717
        1.3700 0.662 7.775
        1.3800 0.668 7.833
        1.3900 0.673 7.891
        1.4000 0.677 7.950
        1.4100 0.681 8.008
        1.4200 0.684 8.067
        1.4300 0.687 8.127
        1.4400 0.691 8.188
        1.4500 0.696 8.250
        1.4600 0.702 8.311
        1.4700 0.708 8.371
        1.4800 0.714 8.431
        1.4900 0.720 8.492
        1.5000 0.726 8.552
        1.5100 0.732 8.612
        1.5200 0.738 8.673
        1.5300 0.745 8.734
        1.5400 0.757 8.795
        1.5500 0.761 8.855
        1.5600 0.770 8.914
        1.5700 0.778 8.972
        1.5800 0.785 9.031
        1.5900 0.792 9.089
        1.6000 0.799 9.148
        1.6100 0.807 9.207
        1.6200 0.815 9.264
        1.6300 0.822 9.322
        1.6400 0.828 9.380
        1.6500 0.834 9.438
        1.6600 0.842 9.497
        1.6700 0.849 9.555
        1.6800 0.856 9.613
        1.6900 0.863 9.670
        1.7000 0.870 9.727
        1.7100 0.875 9.784
        1.7200 0.881 9.841
        1.7300 0.885 9.899
        1.7400 0.890 9.959
        1.7500 0.895 10.019
        1.7600 0.901 10.080
        1.7700 0.908 10.140
        1.7800 0.916 10.199
        1.7900 0.923 10.258
        1.8000 0.930 10.316
        1.8100 0.935 10.375
        1.8200 0.940 10.437
        1.8300 0.948 10.499
        1.8400 0.956 10.561
        1.8500 0.968 10.622
        1.8600 0.978 10.682
        1.8700 0.989 10.741
        1.8800 0.999 10.798
        1.8900 1.011 10.857
        1.9000 1.021 10.914
        1.9100 1.032 10.967
        1.9200 1.039 11.021
        1.9300 1.046 11.078
        1.9400 1.052 11.135
        1.9500 1.059 11.193
        1.9600 1.066 11.250
        1.9700 1.073 11.308
        1.9800 1.080 11.366
        1.9900 1.087 11.425
        2.0000 1.094 11.484
        2.0100 1.103 11.543
        2.0200 1.111 11.602
        2.0300 1.120 11.660
        2.0400 1.129 11.718
        2.0500 1.137 11.776
        2.0600 1.146 11.834
        2.0700 1.154 11.892
        2.0800 1.163 11.950
        2.0900 1.172 12.007
        2.1000 1.180 12.065
        2.1100 1.189 12.123
        2.1200 1.197 12.182
        2.1300 1.206 12.240
        2.1400 1.215 12.297
        2.1500 1.223 12.355
        2.1600 1.232 12.413
        2.1700 1.241 12.471
        2.1800 1.250 12.530
        2.1900 1.258 12.587
        2.2000 1.267 12.646
        2.2100 1.276 12.705
        2.2200 1.286 12.763
        2.2300 1.295 12.821
        2.2400 1.305 12.879
        2.2500 1.315 12.937
        2.2600 1.324 12.996
        2.2700 1.334 13.053
        2.2800 1.343 13.111
        2.2900 1.353 13.170
        2.3000 1.363 13.227
        2.3100 1.373 13.286
        2.3200 1.384 13.343
        2.3300 1.394 13.401
        2.3400 1.404 13.460
        2.3500 1.414 13.518
        2.3600 1.424 13.574
        2.3700 1.434 13.632
        2.3800 1.445 13.691
        2.3900 1.455 13.750
        2.4000 1.465 13.809
        2.4100 1.478 13.868
        2.4200 1.490 13.925
        2.4300 1.500 13.981
        2.4400 1.513 14.041
        2.4500 1.525 14.098
        2.4600 1.538 14.155
        2.4700 1.550 14.212
        2.4800 1.562 14.267
        2.4900 1.572 14.325
        2.5000 1.583 14.381
        2.5063 1.590 14.418
        2.5126 1.598 14.455
        2.5189 1.606 14.491
        2.5253 1.614 14.527
        2.5316 1.623 14.564
        2.5381 1.631 14.600
        2.5445 1.639 14.637
        2.5510 1.647 14.673
        2.5575 1.656 14.710
        2.5641 1.664 14.747
        2.5707 1.672 14.784
        2.5773 1.681 14.821
        2.5840 1.689 14.859
        2.5907 1.698 14.896
        2.5974 1.707 14.933
        2.6042 1.715 14.971
        2.6110 1.724 15.009
        2.6178 1.733 15.047
        2.6247 1.742 15.085
        2.6316 1.751 15.123
        2.6385 1.760 15.162
        2.6455 1.769 15.200
        2.6525 1.778 15.239
        2.6596 1.787 15.277
        2.6667 1.796 15.316
        2.6738 1.805 15.355
        2.6810 1.815 15.394
        2.6882 1.824 15.433
        2.6954 1.833 15.472
        2.7027 1.842 15.512
        2.7100 1.850 15.552
        2.7174 1.859 15.592
        2.7248 1.868 15.632
        2.7322 1.878 15.673
        2.7397 1.887 15.713
        2.7473 1.896 15.754
        2.7548 1.905 15.796
        2.7624 1.915 15.837
        2.7701 1.925 15.879
        2.7778 1.935 15.920
        2.7855 1.944 15.961
        2.7933 1.953 16.003
        2.8011 1.963 16.045
        2.8090 1.972 16.088
        2.8169 1.981 16.131
        2.8249 1.991 16.174
        2.8329 2.001 16.217
        2.8409 2.011 16.260
        2.8490 2.021 16.304
        2.8571 2.031 16.347
        2.8653 2.041 16.391
        2.8736 2.051 16.436
        2.8818 2.061 16.480
        2.8902 2.071 16.525
        2.8986 2.081 16.570
        2.9070 2.091 16.615
        2.9155 2.101 16.660
        2.9240 2.111 16.706
        2.9326 2.121 16.752
        2.9412 2.132 16.798
        2.9499 2.142 16.845
        2.9586 2.153 16.891
        2.9674 2.163 16.938
        2.9762 2.174 16.985
        2.9851 2.184 17.032
        2.9940 2.195 17.080
        3.0030 2.205 17.128
        3.0120 2.217 17.176
        3.0211 2.227 17.224
        3.0303 2.238 17.273
        3.0395 2.249 17.322
        3.0488 2.260 17.372
        3.0581 2.271 17.421
        3.0675 2.282 17.471
        3.0769 2.292 17.521
        3.0864 2.303 17.572
        3.0960 2.315 17.623
        3.1056 2.326 17.674
        3.1153 2.338 17.725
        3.1250 2.349 17.776
        3.1348 2.360 17.928
        3.1447 2.371 17.881
        3.1546 2.383 17.933
        3.1646 2.395 17.986
        3.1746 2.407 18.039
        3.1847 2.418 18.092
        3.1949 2.429 18.146
        3.2051 2.440 18.201
        3.2154 2.452 18.256
        3.2258 2.464 18.312
        3.2362 2.476 18.367
        3.2468 2.489 18.423
        3.2573 2.501 18.479
        3.2680 2.513 18.535
        3.2787 2.526 18.592
        3.2895 2.538 18.649
        3.3003 2.550 18.707
        3.3113 2.562 18.765
        3.3223 2.575 18.823
        3.3333 2.588 18.882
        3.3445 2.600 18.941
        3.3557 2.612 19.001
        3.3670 2.624 19.062
        3.3784 2.638 19.123
        3.3898 2.651 19.184
        3.4014 2.665 19.245
        3.4130 2.677 19.306
        3.4247 2.690 19.369
        3.4364 2.703 19.433
        3.4483 2.717 19.497
        3.4602 2.732 19.561
        3.4722 2.746 19.624
        3.4843 2.760 19.689
        3.4965 2.773 19.754
        3.5088 2.787 19.921
        3.5211 2.802 19.888
        3.5336 2.818 19.954
        3.5461 2.833 20.021
        3.5587 2.847 20.088
        3.5714 2.861 20.157
        3.5842 2.876 20.226
        3.5971 2.892 20.296
        3.6101 2.909 20.366
        3.6232 2.925 20.436
        3.6364 2.940 20.507
        3.6496 2.956 20.579
        3.6630 2.973 20.652
        3.6765 2.990 20.724
        3.6900 3.007 20.797
        3.7037 3.024 20.871
        3.7175 3.042 20.946
        3.7313 3.060 21.021
        3.7453 3.078 21.096
        3.7594 3.097 21.172
        3.7736 3.115 21.248
        3.7879 3.134 21.325
        3.8023 3.153 21.402
        3.8168 3.172 21.480
        3.8314 3.192 21.559
        3.8462 3.211 21.638
        3.8610 3.231 21.717
        3.8760 3.251 21.798
        3.8891 3.272 21.879
        3.9063 3.293 21.961
        3.9216 3.314 22.043
        3.9370 3.336 22.125
        3.9526 3.357 22.209
        3.9683 3.379 22.293
        3.9841 3.401 22.378
        4.0000 3.425 22.464
        4.0161 3.449 22.549
        4.0323 3.473 22.634
        4.0486 3.496 22.721
        4.0650 3.518 22.808
        4.0816 3.542 22.897
        4.0984 3.567 22.986
        4.1152 3.592 23.076
        4.1322 3.618 23.167
        4.1494 3.644 23.258
        4.1667 3.671 23.348
        4.1841 3.697 23.440
        4.2017 3.723 23.532
        4.2194 3.749 23.625
        4.2373 3.777 23.720
        4.2553 3.804 23.815
        4.2735 3.833 23.911
        4.2918 3.862 24.007
        4.3103 3.891 24.104
        4.3290 3.921 24.201
        4.3478 3.951 24.299
        4.3668 3.981 24.398
        4.3860 4.011 24.497
        4.4053 4.042 24.598
        4.4249 4.074 24.699
        4.4444 4.106 24.801
        4.4643 4.140 24.903
        4.4843 4.174 25.005
        4.5045 4.207 25.107
        4.5249 4.240 25.211
        4.5455 4.275 25.317
        4.5662 4.310 25.422
        4.5872 4.347 25.526
        4.6083 4.382 25.631
        4.6296 4.417 25.736
        4.6512 4.452 25.843
        4.6729 4.497 25.950
        4.6948 4.522 26.058
        4.7170 4.557 26.167
        4.7393 4.592 26.277
        4.7619 4.627 26.388
        4.7847 4.662 26.500
        4.8077 4.696 26.614
        4.8309 4.732 26.729
        4.8544 4.768 26.845
        4.8780 4.804 26.963
        4.9020 4.841 27.081
        4.9261 4.878 27.201
        4.9505 4.914 27.321
        4.9751 4.950 27.444
        5.0000 4.987 27.569
        5.0251 5.026 27.696
        5.0505 5.066 27.822
        5.0761 5.106 27.950
        5.1020 5.145 28.080
        5.1282 5.185 28.212
        5.1546 5.227 28.346
        5.1813 5.271 28.480
        5.2083 5.313 28.615
        5.2356 5.357 28.752
        5.2632 5.401 28.891
        5.2910 5.448 29.031
        5.3191 5.493 29.172
        5.3476 5.540 29.316
        5.3763 5.568 29.462
        5.4054 5.639 29.610
        5.4346 5.690 29.758
        5.4645 5.744 29.906
        5.4945 5.796 30.057
        5.5249 5.852 30.209
        5.5556 5.908 30.363
        5.5866 5.967 30.517
        5.6180 6.027 30.671
        5.6497 6.097 30.925
        5.6818 6.147 30.982
        5.7143 6.209 31.140
        5.7471 6.273 31.298
        5.7803 6.338 31.456
        5.8140 6.402 31.615
        5.8480 6.465 31.776
        5.8824 6.529 31.940
        5.9172 6.595 32.105
        5.9524 6.662 32.272
        5.9880 6.731 32.441
        6.0241 6.803 32.609
        6.0606 6.875 32.777
        6.0976 6.945 32.946
        6.1350 7.014 33.118
        6.1728 7.085 33.293
        6.2112 7.157 33.472
        6.2500 7.234 33.651
        6.2893 7.310 33.829
        6.3291 7.388 34.008
        6.3694 7.463 34.189
        6.4103 7.539 34.372
        6.4516 7.616 34.559
        6.4935 7.696 34.748
        6.5359 7.777 34.939
        6.5789 7.860 35.130
        6.6225 7.942 35.322
        6.6667 8.024 35.516
        6.7114 8.106 35.715
        6.7568 8.192 35.915
        6.8027 8.278 36.117
        6.8493 8.366 36.320
        6.8966 8.453 36.526
        6.9444 8.541 36.735
        6.9930 8.631 36.945
        7.0423 8.720 37.158
        7.0922 8.809 37.375
        7.1429 8.901 37.597
        7.1942 8.997 37.821
        7.2464 9.096 38.045
        7.2993 9.193 38.270
        7.3529 9.289 38.499
        7.4074 9.386 38.732
        7.4627 9.486 38.969
        7.5188 9.587 39.210
        7.5758 9.690 39.454
        7.6336 9.796 39.701
        7.6923 9.903 39.952
        7.7519 10.012 40.205
        7.8125 10.123 40.461
        7.8740 10.235 40.719
        7.9365 10.347 40.980
        8.0000 10.459 41.247
        8.0645 10.572 41.520
        8.1301 10.690 41.798
        8.1967 10.811 42.079
        8.2645 10.933 42.364
        8.3333 11.057 42.655
        8.4034 11.186 42.949
        8.4746 11.317 43.248
        8.5470 11.450 43.549
        8.6207 11.584 43.856
        8.6957 11.721 44.169
        8.7719 11.862 44.487
        8.8496 12.006 44.812
        8.9286 12.156 45.140
        9.0090 12.309 45.471
        9.0909 12.464 45.806
        9.1743 12.621 46.148
        9.2593 12.784 46.495
        9.3458 12.951 46.846
        9.4340 13.120 47.200
        9.5238 13.290 47.562
        9.6154 13.464 47.930
        9.7087 13.643 48.304
        9.8039 13.826 48.685
        9.9010 14.013 49.071
        10.0000 14.205 49.464
        10.1010 14.403 49.865
        10.2041 14.608 50.269
        10.3093 14.816 50.678
        10.4167 15.029 51.090
        10.5263 15.242 51.511
        10.6383 15.461 51.940
        10.7527 15.686 52.375
        10.8696 15.916 52.817
        10.9890 16.151 53.265
        11.1111 16.390 53.719
        11.2360 16.632 54.182
        11.3636 16.879 54.652
        11.4943 17.129 55.135
        11.6279 17.390 55.622
        11.7647 17.652 56.119
        11.9048 17.920 56.624
        12.0482 18.191 57.140
        12.1951 18.470 57.666
        12.3457 18.755 58.200
        12.5000 19.042 58.745
        12.6582 19.332 59.303
        12.8205 19.628 59.878
        12.9870 19.934 60.467
        13.1579 20.250 61.069
        13.3333 20.574 61.681
        13.5135 20.905 62.304
        13.6986 21.239 62.940
        13.8889 21.577 63.591
        14.0845 21.917 64.267
        14.2857 22.270 64.962
        14.4928 22.630 65.679
        14.7059 23.004 66.414
        14.9254 23.386 67.174
        15.1515 23.783 67.955
        15.3846 24.193 68.754
        15.6250 24.610 69.577
        15.8730 25.037 70.427
        16.1290 25.476 71.310
        16.3934 25.935 72.219
        16.6667 26.404 73.160
        16.9492 26.888 74.137
        17.2414 27.392 75.157
        17.5439 27.922 76.216
        17.8571 28.480 77.313
        18.1818 29.066 78.451
        18.5185 29.682 79.629
        18.8679 30.330 80.852
        19.2308 31.013 82.120
        19.6078 31.732 83.436
        20.0000 32.491 84.805
        20.4082 33.297 86.231
        20.8333 34.160 87.708
        21.2766 35.079 89.230
        21.7391 36.042 90.804
        22.2222 37.051 92.450
        22.7273 38.125 94.189
        23.2558 39.302 95.994
        23.8095 40.568 97.868
        24.3902 41.933 99.790
        25.0000 43.376 101.805
        25.6410 44.947 103.885
        26.3158 46.628 106.055
        27.0270 48.455 108.288
        27.7778 50.415 110.615
        28.5714 52.551 113.008
        29.4118 54.853 115.473
        30.3030 57.334 118.008
        31.2500 60.007 120.638
        32.2581 62.917 123.353
        33.3333 66.089 126.149
        34.4828 69.557 128.989
        35.7143 73.328 131.883
        37.0370 77.440 134.785
        38.4615 81.894 137.698
        40.0000 86.720 140.601
        41.6667 91.950 143.514
        43.4783 97.658 146.384
        45.4545 103.886 149.170
        47.6190 110.660 151.765
        50.0000 117.988 154.202
        52.6316 125.846 156.236
        55.5556 134.394 158.413