# 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: |
    Graphite pellet from Dixon HPN-2 powder.
DATA:
  - type: tabulated nk
    data: |
        0.2000 0.840 0.723
        0.2100 0.900 0.837
        0.2200 0.962 0.952
        0.2300 1.045 1.060
        0.2400 1.162 1.162
        0.2500 1.326 1.221
        0.2600 1.490 1.195
        0.2700 1.591 1.125
        0.2800 1.646 1.061
        0.2900 1.679 1.009
        0.3000 1.697 0.968
        0.3100 1.706 0.937
        0.3200 1.710 0.917
        0.3300 1.718 0.905
        0.3400 1.724 0.890
        0.3500 1.721 0.880
        0.3600 1.720 0.880
        0.3700 1.722 0.883
        0.3800 1.727 0.886
        0.3900 1.733 0.889
        0.4000 1.739 0.892
        0.4100 1.743 0.894
        0.4200 1.746 0.898
        0.4300 1.749 0.904
        0.4400 1.752 0.912
        0.4500 1.756 0.920
        0.4600 1.761 0.929
        0.4700 1.767 0.939
        0.4800 1.775 0.947
        0.4900 1.782 0.955
        0.5000 1.788 0.962
        0.5100 1.794 0.970
        0.5200 1.801 0.977
        0.5300 1.807 0.985
        0.5400 1.812 0.992
        0.5500 1.817 1.000
        0.5600 1.821 1.008
        0.5700 1.827 1.018
        0.5800 1.833 1.025
        0.5900 1.838 1.034
        0.6000 1.842 1.043
        0.6100 1.847 1.052
        0.6200 1.852 1.062
        0.6300 1.857 1.072
        0.6400 1.864 1.083
        0.6500 1.870 1.091
        0.6600 1.874 1.099
        0.6700 1.878 1.110
        0.6800 1.884 1.120
        0.6900 1.889 1.131
        0.7000 1.895 1.142
        0.7100 1.902 1.152
        0.7210 1.909 1.161
        0.7300 1.915 1.171
        0.7400 1.921 1.180
        0.7500 1.926 1.190
        0.7600 1.932 1.201
        0.7700 1.939 1.210
        0.7800 1.945 1.219
        0.7900 1.952 1.230
        0.8000 1.960 1.239
        0.8100 1.964 1.246
        0.8200 1.969 1.256
        0.8300 1.974 1.266
        0.8400 1.980 1.276
        0.8500 1.987 1.287
        0.8600 1.995 1.297
        0.8700 2.001 1.305
        0.8800 2.006 1.314
        0.8900 2.012 1.324
        0.9000 2.017 1.333
        0.9100 2.023 1.344
        0.9200 2.029 1.353
        0.9300 2.035 1.363
        0.9400 2.042 1.373
        0.9500 2.048 1.383
        0.9600 2.055 1.392
        0.9700 2.061 1.401
        0.9800 2.067 1.411
        0.9900 2.073 1.420
        1.0000 2.078 1.430
        1.0100 2.084 1.440
        1.0200 2.090 1.450
        1.0300 2.096 1.461
        1.0400 2.103 1.472
        1.0500 2.110 1.481
        1.0600 2.116 1.491
        1.0700 2.124 1.502
        1.0800 2.132 1.511
        1.0900 2.138 1.520
        1.1000 2.145 1.530
        1.1100 2.152 1.540
        1.1200 2.158 1.550
        1.1300 2.166 1.560
        1.1400 2.174 1.570
        1.1500 2.182 1.580
        1.1600 2.189 1.589
        1.1700 2.197 1.598
        1.1800 2.205 1.607
        1.1900 2.214 1.616
        1.2000 2.218 1.624
        1.2100 2.225 1.637
        1.2200 2.234 1.646
        1.2300 2.242 1.656
        1.2400 2.252 1.665
        1.2500 2.260 1.673
        1.2600 2.269 1.682
        1.2700 2.277 1.690
        1.2800 2.286 1.698
        1.2900 2.294 1.707
        1.3000 2.303 1.716
        1.3100 2.312 1.724
        1.3200 2.320 1.732
        1.3300 2.329 1.739
        1.3400 2.338 1.747
        1.3500 2.347 1.754
        1.3600 2.355 1.761
        1.3700 2.363 1.768
        1.3800 2.371 1.776
        1.3900 2.379 1.783
        1.4000 2.387 1.790
        1.4100 2.395 1.797
        1.4200 2.403 1.805
        1.4300 2.411 1.812
        1.4400 2.420 1.820
        1.4500 2.428 1.827
        1.4600 2.436 1.834
        1.4700 2.445 1.841
        1.4800 2.455 1.848
        1.4900 2.463 1.854
        1.5000 2.472 1.860
        1.5100 2.481 1.866
        1.5200 2.490 1.872
        1.5300 2.498 1.876
        1.5400 2.505 1.882
        1.5500 2.513 1.889
        1.5600 2.522 1.894
        1.5700 2.530 1.899
        1.5800 2.536 1.904
        1.5900 2.543 1.911
        1.6000 2.551 1.917
        1.6100 2.559 1.923
        1.6200 2.567 1.929
        1.6300 2.575 1.934
        1.6400 2.582 1.939
        1.6500 2.590 1.945
        1.6600 2.597 1.950
        1.6700 2.605 1.956
        1.6800 2.612 1.961
        1.6900 2.620 1.967
        1.7000 2.627 1.972
        1.7100 2.635 1.978
        1.7200 2.642 1.984
        1.7300 2.650 1.990
        1.7400 2.658 1.995
        1.7500 2.666 2.001
        1.7600 2.675 2.005
        1.7700 2.681 2.010
        1.7800 2.688 2.017
        1.7900 2.697 2.025
        1.8000 2.708 2.030
        1.8100 2.719 2.036
        1.8200 2.732 2.037
        1.8300 2.740 2.036
        1.8400 2.747 2.038
        1.8500 2.753 2.040
        1.8600 2.760 2.041
        1.8700 2.765 2.043
        1.8800 2.770 2.047
        1.8900 2.776 2.051
        1.9000 2.782 2.055
        1.9100 2.788 2.058
        1.9200 2.793 2.062
        1.9300 2.800 2.066
        1.9400 2.806 2.070
        1.9500 2.812 2.074
        1.9600 2.819 2.078
        1.9700 2.825 2.081
        1.9800 2.831 2.085
        1.9900 2.839 2.088
        2.0000 2.842 2.090
        2.0100 2.847 2.096
        2.0200 2.855 2.099
        2.0300 2.860 2.102
        2.0400 2.866 2.106
        2.0500 2.873 2.110
        2.0600 2.878 2.112
        2.0700 2.884 2.116
        2.0800 2.890 2.120
        2.0900 2.896 2.123
        2.1000 2.902 2.125
        2.1100 2.906 2.127
        2.1200 2.911 2.130
        2.1300 2.916 2.133
        2.1400 2.921 2.136
        2.1500 2.925 2.139
        2.1600 2.929 2.143
        2.1700 2.934 2.146
        2.1800 2.939 2.149
        2.1900 2.942 2.152
        2.2000 2.946 2.157
        2.2100 2.951 2.161
        2.2200 2.955 2.164
        2.2300 2.960 2.169
        2.2400 2.965 2.172
        2.2500 2.970 2.175
        2.2600 2.973 2.179
        2.2700 2.977 2.184
        2.2800 2.981 2.187
        2.2900 2.985 2.192
        2.3000 2.989 2.196
        2.3100 2.994 2.200
        2.3200 2.998 2.205
        2.3300 3.003 2.209
        2.3400 3.007 2.213
        2.3500 3.011 2.217
        2.3600 3.016 2.222
        2.3700 3.020 2.226
        2.3800 3.025 2.231
        2.3900 3.030 2.235
        2.4000 3.034 2.238
        2.4100 3.038 2.242
        2.4200 3.042 2.246
        2.4300 3.046 2.251
        2.4400 3.050 2.255
        2.4500 3.055 2.260
        2.4600 3.059 2.264
        2.4700 3.063 2.269
        2.4800 3.068 2.273
        2.4900 3.072 2.277
        2.5000 3.075 2.281
        2.5063 3.077 2.285
        2.5126 3.081 2.289
        2.5189 3.083 2.288
        2.5253 3.082 2.294
        2.5316 3.088 2.297
        2.5381 3.092 2.302
        2.5445 3.095 2.302
        2.5510 3.095 2.306
        2.5575 3.100 2.311
        2.5641 3.104 2.312
        2.5707 3.106 2.314
        2.5773 3.106 2.318
        2.5840 3.112 2.322
        2.5907 3.113 2.326
        2.5974 3.119 2.331
        2.6042 3.122 2.331
        2.6110 3.122 2.333
        2.6178 3.124 2.341
        2.6247 3.133 2.342
        2.6316 3.134 2.341
        2.6385 3.136 2.349
        2.6455 3.143 2.352
        2.6525 3.144 2.351
        2.6596 3.145 2.356
        2.6667 3.149 2.359
        2.6738 3.150 2.363
        2.6810 3.154 2.368
        2.6882 3.159 2.370
        2.6954 3.161 2.374
        2.7027 3.165 2.380
        2.7100 3.171 2.381
        2.7174 3.173 2.381
        2.7248 3.173 2.386
        2.7322 3.179 2.395
        2.7397 3.182 2.393
        2.7473 3.183 2.399
        2.7548 3.188 2.403
        2.7624 3.192 2.408
        2.7701 3.196 2.414
        2.7778 3.204 2.416
        2.7855 3.208 2.415
        2.7933 3.209 2.420
        2.8011 3.213 2.424
        2.8090 3.215 2.424
        2.8169 3.216 2.430
        2.8249 3.223 2.436
        2.8329 3.225 2.438
        2.8409 3.230 2.444
        2.8490 3.235 2.447
        2.8571 3.240 2.453
        2.8653 3.243 2.453
        2.8736 3.246 2.459
        2.8818 3.252 2.462
        2.8902 3.256 2.468
        2.8986 3.261 2.469
        2.9070 3.264 2.474
        2.9155 3.270 2.476
        2.9240 3.273 2.479
        2.9326 3.276 2.484
        2.9412 3.282 2.489
        2.9499 3.285 2.491
        2.9586 3.288 2.497
        2.9674 3.294 2.503
        2.9762 3.300 2.506
        2.9851 3.306 2.509
        2.9940 3.311 2.510
        3.0030 3.313 2.514
        3.0120 3.318 2.522
        3.0211 3.326 2.524
        3.0303 3.329 2.526
        3.0395 3.335 2.531
        3.0488 3.338 2.533
        3.0581 3.344 2.539
        3.0675 3.350 2.538
        3.0769 3.350 2.543
        3.0864 3.357 2.553
        3.0960 3.366 2.553
        3.1056 3.369 2.553
        3.1153 3.370 2.556
        3.1250 3.373 2.563
        3.1348 3.382 2.571
        3.1447 3.389 2.571
        3.1546 3.393 2.573
        3.1646 3.397 2.578
        3.1746 3.404 2.581
        3.1847 3.405 2.583
        3.1949 3.412 2.592
        3.2051 3.421 2.594
        3.2154 3.424 2.594
        3.2258 3.427 2.598
        3.2362 3.430 2.604
        3.2468 3.437 2.610
        3.2573 3.443 2.613
        3.2680 3.448 2.615
        3.2787 3.453 2.622
        3.2895 3.460 2.624
        3.3003 3.464 2.627
        3.3113 3.468 2.635
        3.3223 3.481 2.638
        3.3333 3.483 2.636
        3.3445 3.487 2.640
        3.3557 3.491 2.646
        3.3670 3.500 2.648
        3.3784 3.501 2.650
        3.3898 3.508 2.658
        3.4014 3.515 2.658
        3.4130 3.519 2.662
        3.4247 3.521 2.667
        3.4364 3.527 2.676
        3.4483 3.536 2.678
        3.4602 3.542 2.678
        3.4722 3.545 2.683
        3.4843 3.552 2.687
        3.4965 3.557 2.690
        3.5088 3.562 2.695
        3.5211 3.567 2.699
        3.5336 3.573 2.704
        3.5461 3.581 2.709
        3.5587 3.584 2.711
        3.5714 3.590 2.716
        3.5842 3.595 2.717
        3.5971 3.598 2.724
        3.6101 3.605 2.730
        3.6232 3.611 2.735
        3.6364 3.620 2.739
        3.6496 3.627 2.740
        3.6630 3.629 2.743
        3.6765 3.633 2.752
        3.6900 3.642 2.757
        3.7037 3.647 2.760
        3.7175 3.656 2.766
        3.7313 3.661 2.768
        3.7453 3.670 2.774
        3.7594 3.673 2.773
        3.7736 3.678 2.762
        3.7879 3.684 2.785
        3.8023 3.689 2.791
        3.8168 3.697 2.794
        3.8314 3.702 2.799
        3.8462 3.708 2.805
        3.8610 3.714 2.810
        3.8760 3.720 2.817
        3.8911 3.729 2.820
        3.9063 3.736 2.825
        3.9216 3.743 2.829
        3.9370 3.748 2.831
        3.9526 3.747 2.838
        3.9683 3.757 2.849
        3.9841 3.769 2.850
        4.0000 3.773 2.854
        4.0161 3.778 2.862
        4.0323 3.788 2.869
        4.0486 3.794 2.873
        4.0650 3.804 2.877
        4.0816 3.810 2.881
        4.0984 3.818 2.889
        4.1152 3.826 2.891
        4.1322 3.830 2.891
        4.1494 3.832 2.900
        4.1667 3.842 2.906
        4.1841 3.842 2.910
        4.2017 3.844 2.927
        4.2194 3.858 2.940
        4.2373 3.876 2.948
        4.2553 3.889 2.948
        4.2735 3.894 2.953
        4.2918 3.906 2.962
        4.3103 3.923 2.962
        4.3290 3.931 2.957
        4.3478 3.931 2.962
        4.3668 3.940 2.969
        4.3860 3.945 2.971
        4.4053 3.951 2.978
        4.4248 3.959 2.984
        4.4444 3.965 2.989
        4.4643 3.971 2.997
        4.4843 3.981 3.006
        4.5045 3.989 3.012
        4.5249 3.999 3.020
        4.5455 4.010 3.025
        4.5662 4.018 3.030
        4.5872 4.027 3.035
        4.6083 4.034 3.041
        4.6296 4.043 3.048
        4.6512 4.053 3.056
        4.6729 4.062 3.064
        4.6948 4.075 3.072
        4.7170 4.084 3.075
        4.7393 4.092 3.083
        4.7619 4.107 3.092
        4.7847 4.118 3.095
        4.8077 4.127 3.101
        4.8309 4.137 3.103
        4.8544 4.141 3.113
        4.8780 4.158 3.124
        4.9020 4.173 3.122
        4.9261 4.177 3.125
        4.9505 4.183 3.134
        4.9751 4.192 3.142
        5.0000 4.192 3.154
        5.0251 4.211 3.179
        5.0505 4.237 3.182
        5.0761 4.252 3.186
        5.1020 4.266 3.191
        5.1282 4.284 3.194
        5.1546 4.297 3.197
        5.1813 4.311 3.200
        5.2083 4.323 3.204
        5.2356 4.340 3.208
        5.2632 4.351 3.208
        5.2910 4.362 3.214
        5.3191 4.378 3.218
        5.3476 4.389 3.220
        5.3763 4.403 3.223
        5.4054 4.414 3.228
        5.4348 4.428 3.230
        5.4645 4.441 3.234
        5.4945 4.452 3.236
        5.5249 4.465 3.239
        5.5556 4.478 3.242
        5.5866 4.490 3.244
        5.6180 4.501 3.248
        5.6497 4.512 3.255
        5.6818 4.529 3.256
        5.7143 4.536 3.254
        5.7471 4.549 3.265
        5.7803 4.565 3.266
        5.8140 4.575 3.265
        5.8480 4.585 3.268
        5.8824 4.597 3.271
        5.9172 4.608 3.275
        5.9524 4.620 3.280
        5.9880 4.634 3.284
        6.0241 4.646 3.287
        6.0606 4.657 3.288
        6.0976 4.669 3.291
        6.1350 4.679 3.293
        6.1728 4.688 3.294
        6.2112 4.691 3.301
        6.2500 4.693 3.312
        6.2893 4.713 3.347
        6.3291 4.764 3.343
        6.3694 4.777 3.323
        6.4103 4.780 3.316
        6.4516 4.780 3.322
        6.4935 4.797 3.329
        6.5359 4.812 3.327
        6.5789 4.822 3.330
        6.6225 4.831 3.330
        6.6667 4.838 3.333
        6.7114 4.850 3.339
        6.7568 4.863 3.341
        6.8027 4.873 3.345
        6.8493 4.882 3.345
        6.8966 4.889 3.351
        6.9444 4.899 3.357
        6.9930 4.911 3.365
        7.0423 4.922 3.369
        7.0922 4.934 3.376
        7.1429 4.948 3.375
        7.1942 4.955 3.380
        7.2464 4.964 3.389
        7.2993 4.978 3.392
        7.3529 4.983 3.396
        7.4074 4.998 3.407
        7.4627 5.011 3.409
        7.5188 5.020 3.414
        7.5758 5.030 3.419
        7.6336 5.039 3.425
        7.6923 5.047 3.431
        7.7519 5.058 3.440
        7.8125 5.068 3.442
        7.8740 5.073 3.453
        7.9365 5.080 3.464
        8.0000 5.094 3.479
        8.0645 5.113 3.486
        8.1301 5.120 3.489
        8.1967 5.127 3.504
        8.2645 5.144 3.515
        8.3333 5.155 3.525
        8.4034 5.170 3.536
        8.4746 5.181 3.542
        8.5470 5.194 3.552
        8.6207 5.207 3.565
        8.6957 5.222 3.571
        8.7719 5.231 3.580
        8.8496 5.246 3.590
        8.9286 5.252 3.598
        9.0090 5.260 3.620
        9.0909 5.283 3.635
        9.1743 5.296 3.641
        9.2593 5.309 3.653
        9.3458 5.325 3.665
        9.4340 5.340 3.675
        9.5238 5.353 3.686
        9.6154 5.364 3.694
        9.7087 5.374 3.712
        9.8039 5.388 3.727
        9.9010 5.401 3.744
        10.0000 5.420 3.759
        10.1010 5.440 3.774
        10.2041 5.458 3.776
        10.3093 5.458 3.790
        10.4167 5.474 3.809
        10.5263 5.489 3.825
        10.6383 5.506 3.842
        10.7527 5.523 3.855
        10.8696 5.532 3.865
        10.9890 5.540 3.882
        11.1111 5.549 3.903
        11.2360 5.561 3.927
        11.3636 5.572 3.934
        11.4943 5.571 3.979
        11.6279 5.616 4.009
        11.7647 5.627 4.015
        11.9048 5.638 4.037
        12.0482 5.652 4.062
        12.1951 5.661 4.088
        12.3457 5.677 4.124
        12.5000 5.706 4.153
        12.6582 5.726 4.168
        12.8205 5.738 4.198
        12.9870 5.761 4.225
        13.1579 5.777 4.250
        13.3333 5.791 4.277
        13.5135 5.808 4.308
        13.6986 5.825 4.336
        13.8889 5.839 4.368
        14.0845 5.850 4.404
        14.2857 5.863 4.445
        14.4928 5.877 4.493
        14.7059 5.904 4.541
        14.9254 5.935 4.574
        15.1515 5.952 4.613
        15.3846 5.971 4.657
        15.6250 5.972 4.705
        15.8730 5.996 4.784
        16.1290 6.042 4.833
        16.3934 6.071 4.885
        16.6667 6.101 4.938
        16.9492 6.129 5.001
        17.2414 6.167 5.055
        17.5439 6.202 5.115
        17.8571 6.238 5.173
        18.1818 6.271 5.239
        18.5185 6.307 5.303
        18.8679 6.340 5.365
        19.2308 6.367 5.434
        19.6078 6.398 5.524
        20.0000 6.438 5.606
        20.4082 6.460 5.702
        20.8333 6.511 5.823
        21.2766 6.582 5.922
        21.7391 6.629 6.020
        22.2222 6.686 6.149
        22.7273 6.777 6.281
        23.2558 6.867 6.393
        23.8095 6.950 6.519
        24.3902 7.053 6.645
        25.0000 7.154 6.755
        25.6410 7.247 6.890
        26.3158 7.363 7.023
        27.0270 7.469 7.165
        27.7778 7.602 7.307
        28.5714 7.709 7.462
        29.4118 7.830 7.675
        30.3030 8.035 7.891
        31.2500 8.224 8.052
        32.2581 8.425 8.269
        33.3333 8.682 8.482
        34.4828 8.969 8.664
        35.7143 9.225 8.868
        37.0370 9.586 9.100
        38.4615 9.984 9.171
        40.0000 10.214 9.368
        41.6667 10.813 9.559
        43.4783 10.952 9.451
        45.4545 11.266 9.974
        47.6190 11.898 10.130
        50.0000 12.390 10.524
        52.6316 13.618 10.803
        55.5556 14.474 10.332