# 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 KS-2 powder.
DATA:
  - type: tabulated nk
    data: |
        0.2100 0.861 0.636
        0.2200 0.903 0.721
        0.2300 0.965 0.807
        0.2400 1.050 0.885
        0.2500 1.166 0.936
        0.2600 1.286 0.929
        0.2700 1.367 0.886
        0.2800 1.414 0.842
        0.2900 1.441 0.806
        0.3000 1.458 0.779
        0.3100 1.469 0.758
        0.3200 1.474 0.744
        0.3300 1.482 0.737
        0.3400 1.489 0.726
        0.3500 1.489 0.719
        0.3600 1.489 0.718
        0.3700 1.490 0.721
        0.3800 1.494 0.725
        0.3900 1.499 0.729
        0.4000 1.504 0.733
        0.4100 1.508 0.736
        0.4200 1.511 0.739
        0.4300 1.514 0.745
        0.4400 1.517 0.751
        0.4500 1.520 0.758
        0.4600 1.524 0.765
        0.4700 1.528 0.773
        0.4800 1.532 0.782
        0.4900 1.539 0.790
        0.5000 1.544 0.796
        0.5100 1.549 0.802
        0.5200 1.553 0.809
        0.5300 1.558 0.816
        0.5400 1.562 0.823
        0.5500 1.566 0.831
        0.5600 1.569 0.838
        0.5700 1.572 0.846
        0.5800 1.577 0.855
        0.5900 1.581 0.863
        0.6000 1.585 0.870
        0.6100 1.589 0.878
        0.6200 1.593 0.887
        0.6300 1.597 0.895
        0.6400 1.602 0.905
        0.6500 1.607 0.912
        0.6600 1.610 0.919
        0.6700 1.612 0.928
        0.6800 1.616 0.938
        0.6900 1.621 0.947
        0.7000 1.625 0.956
        0.7100 1.630 0.965
        0.7200 1.634 0.974
        0.7300 1.639 0.983
        0.7400 1.644 0.992
        0.7500 1.648 1.000
        0.7600 1.653 1.010
        0.7700 1.658 1.018
        0.7800 1.663 1.027
        0.7900 1.668 1.036
        0.8000 1.674 1.043
        0.8100 1.678 1.049
        0.8200 1.682 1.058
        0.8300 1.686 1.066
        0.8400 1.689 1.075
        0.8500 1.694 1.083
        0.8600 1.697 1.090
        0.8700 1.701 1.099
        0.8800 1.704 1.108
        0.8900 1.708 1.118
        0.9000 1.713 1.126
        0.9100 1.716 1.135
        0.9200 1.719 1.145
        0.9300 1.724 1.154
        0.9400 1.728 1.164
        0.9500 1.733 1.173
        0.9600 1.737 1.182
        0.9700 1.742 1.191
        0.9800 1.747 1.201
        0.9900 1.751 1.210
        1.0000 1.756 1.219
        1.0100 1.761 1.228
        1.0200 1.766 1.238
        1.0300 1.771 1.247
        1.0400 1.775 1.256
        1.0500 1.781 1.266
        1.0600 1.786 1.275
        1.0700 1.791 1.283
        1.0800 1.796 1.293
        1.0900 1.801 1.302
        1.1000 1.807 1.311
        1.1100 1.812 1.320
        1.1200 1.817 1.329
        1.1300 1.822 1.338
        1.1400 1.828 1.347
        1.1500 1.834 1.356
        1.1600 1.839 1.366
        1.1700 1.845 1.375
        1.1800 1.851 1.384
        1.1900 1.856 1.393
        1.2000 1.864 1.403
        1.2100 1.870 1.410
        1.2200 1.876 1.419
        1.2300 1.883 1.427
        1.2400 1.888 1.435
        1.2500 1.895 1.444
        1.2600 1.901 1.452
        1.2700 1.907 1.460
        1.2800 1.914 1.469
        1.2900 1.920 1.476
        1.3000 1.926 1.484
        1.3100 1.933 1.493
        1.3200 1.939 1.500
        1.3300 1.945 1.508
        1.3400 1.952 1.516
        1.3500 1.959 1.524
        1.3600 1.965 1.531
        1.3700 1.971 1.539
        1.3800 1.978 1.547
        1.3900 1.985 1.554
        1.4000 1.991 1.561
        1.4100 1.997 1.568
        1.4200 2.004 1.575
        1.4300 2.010 1.583
        1.4400 2.016 1.590
        1.4500 2.023 1.597
        1.4600 2.029 1.604
        1.4700 2.036 1.611
        1.4800 2.042 1.619
        1.4900 2.048 1.625
        1.5000 2.054 1.632
        1.5100 2.062 1.640
        1.5200 2.068 1.647
        1.5300 2.076 1.653
        1.5400 2.081 1.659
        1.5500 2.088 1.667
        1.5600 2.095 1.673
        1.5700 2.102 1.680
        1.5800 2.108 1.685
        1.5900 2.113 1.692
        1.6000 2.120 1.698
        1.6100 2.127 1.705
        1.6200 2.134 1.711
        1.6300 2.141 1.717
        1.6400 2.146 1.723
        1.6500 2.153 1.729
        1.6600 2.160 1.735
        1.6700 2.166 1.741
        1.6800 2.172 1.747
        1.6900 2.178 1.754
        1.7000 2.185 1.760
        1.7100 2.191 1.765
        1.7200 2.198 1.771
        1.7300 2.204 1.777
        1.7400 2.211 1.784
        1.7500 2.218 1.789
        1.7600 2.224 1.795
        1.7700 2.231 1.801
        1.7800 2.238 1.807
        1.7900 2.246 1.812
        1.8000 2.253 1.817
        1.8100 2.260 1.820
        1.8200 2.265 1.825
        1.8300 2.271 1.831
        1.8400 2.279 1.836
        1.8500 2.286 1.840
        1.8600 2.293 1.843
        1.8700 2.297 1.847
        1.8800 2.302 1.851
        1.8900 2.307 1.857
        1.9000 2.314 1.862
        1.9100 2.319 1.867
        1.9200 2.325 1.872
        1.9300 2.331 1.876
        1.9400 2.337 1.881
        1.9500 2.343 1.885
        1.9600 2.349 1.890
        1.9700 2.354 1.895
        1.9800 2.361 1.899
        1.9900 2.366 1.904
        2.0000 2.374 1.909
        2.0100 2.380 1.911
        2.0200 2.384 1.915
        2.0300 2.389 1.920
        2.0400 2.395 1.924
        2.0500 2.400 1.928
        2.0600 2.406 1.932
        2.0700 2.411 1.936
        2.0800 2.417 1.940
        2.0900 2.423 1.944
        2.1000 2.428 1.947
        2.1100 2.433 1.951
        2.1200 2.438 1.955
        2.1300 2.442 1.958
        2.1400 2.447 1.962
        2.1500 2.452 1.965
        2.1600 2.456 1.969
        2.1700 2.460 1.973
        2.1800 2.465 1.977
        2.1900 2.469 1.981
        2.2000 2.473 1.985
        2.2100 2.477 1.989
        2.2200 2.482 1.994
        2.2300 2.486 1.998
        2.2400 2.491 2.003
        2.2500 2.496 2.007
        2.2600 2.500 2.009
        2.2700 2.503 2.014
        2.2800 2.506 2.018
        2.2900 2.510 2.023
        2.3000 2.515 2.028
        2.3100 2.519 2.032
        2.3200 2.523 2.037
        2.3300 2.527 2.042
        2.3400 2.531 2.046
        2.3500 2.535 2.051
        2.3600 2.539 2.055
        2.3700 2.544 2.061
        2.3800 2.548 2.065
        2.3900 2.553 2.070
        2.4000 2.557 2.074
        2.4100 2.561 2.076
        2.4200 2.565 2.083
        2.4300 2.570 2.088
        2.4400 2.574 2.092
        2.4500 2.577 2.096
        2.4600 2.580 2.100
        2.4700 2.581 2.107
        2.4800 2.587 2.115
        2.4900 2.592 2.120
        2.5000 2.597 2.127
        2.5063 2.602 2.132
        2.5126 2.608 2.132
        2.5189 2.609 2.133
        2.5253 2.612 2.137
        2.5316 2.615 2.140
        2.5381 2.618 2.143
        2.5445 2.620 2.145
        2.5510 2.623 2.150
        2.5575 2.627 2.153
        2.5641 2.630 2.155
        2.5707 2.634 2.158
        2.5773 2.638 2.160
        2.5840 2.639 2.162
        2.5907 2.642 2.165
        2.5974 2.644 2.170
        2.6042 2.648 2.172
        2.6110 2.651 2.175
        2.6178 2.653 2.179
        2.6247 2.657 2.184
        2.6316 2.662 2.186
        2.6385 2.664 2.187
        2.6455 2.667 2.193
        2.6525 2.673 2.195
        2.6596 2.673 2.197
        2.6667 2.677 2.202
        2.6738 2.681 2.202
        2.6810 2.682 2.205
        2.6882 2.684 2.212
        2.6954 2.691 2.215
        2.7027 2.692 2.216
        2.7100 2.694 2.220
        2.7174 2.698 2.226
        2.7248 2.703 2.227
        2.7322 2.704 2.233
        2.7397 2.711 2.236
        2.7473 2.712 2.239
        2.7548 2.716 2.242
        2.7624 2.719 2.246
        2.7701 2.724 2.250
        2.7778 2.726 2.252
        2.7855 2.729 2.258
        2.7933 2.733 2.262
        2.8011 2.739 2.267
        2.8090 2.743 2.268
        2.8169 2.745 2.272
        2.8249 2.750 2.276
        2.8329 2.754 2.281
        2.8409 2.758 2.283
        2.8490 2.760 2.287
        2.8571 2.767 2.293
        2.8653 2.774 2.295
        2.8736 2.776 2.297
        2.8818 2.779 2.301
        2.8902 2.784 2.303
        2.8986 2.786 2.307
        2.9070 2.789 2.312
        2.9155 2.794 2.318
        2.9240 2.800 2.323
        2.9326 2.806 2.324
        2.9412 2.809 2.328
        2.9499 2.814 2.330
        2.9586 2.816 2.336
        2.9674 2.823 2.339
        2.9762 2.827 2.343
        2.9851 2.832 2.346
        2.9940 2.837 2.350
        3.0030 2.841 2.354
        3.0120 2.846 2.359
        3.0211 2.853 2.360
        3.0303 2.855 2.364
        3.0395 2.863 2.368
        3.0488 2.866 2.369
        3.0581 2.871 2.373
        3.0675 2.875 2.376
        3.0769 2.880 2.380
        3.0864 2.884 2.384
        3.0960 2.891 2.387
        3.1056 2.892 2.388
        3.1153 2.895 2.395
        3.1250 2.900 2.399
        3.1348 2.909 2.406
        3.1447 2.915 2.406
        3.1546 2.918 2.409
        3.1646 2.922 2.414
        3.1746 2.929 2.420
        3.1847 2.937 2.422
        3.1949 2.942 2.421
        3.2051 2.943 2.423
        3.2154 2.947 2.430
        3.2258 2.956 2.435
        3.2362 2.960 2.436
        3.2468 2.965 2.440
        3.2573 2.971 2.442
        3.2680 2.974 2.445
        3.2787 2.979 2.450
        3.2895 2.983 2.453
        3.3003 2.991 2.459
        3.3113 2.996 2.460
        3.3223 3.000 2.464
        3.3333 3.007 2.467
        3.3445 3.011 2.469
        3.3557 3.015 2.474
        3.3670 3.022 2.477
        3.3784 3.027 2.478
        3.3898 3.031 2.482
        3.4014 3.037 2.486
        3.4130 3.039 2.488
        3.4247 3.045 2.493
        3.4364 3.050 2.496
        3.4483 3.055 2.501
        3.4602 3.061 2.505
        3.4722 3.065 2.507
        3.4843 3.070 2.511
        3.4965 3.076 2.515
        3.5088 3.078 2.519
        3.5211 3.084 2.527
        3.5336 3.092 2.529
        3.5461 3.097 2.533
        3.5587 3.102 2.538
        3.5714 3.108 2.542
        3.5842 3.114 2.547
        3.5971 3.123 2.550
        3.6101 3.127 2.550
        3.6232 3.129 2.557
        3.6364 3.139 2.561
        3.6496 3.143 2.562
        3.6630 3.148 2.567
        3.6765 3.153 2.572
        3.6900 3.161 2.576
        3.7037 3.165 2.579
        3.7175 3.171 2.583
        3.7313 3.175 2.588
        3.7453 3.184 2.593
        3.7594 3.187 2.596
        3.7736 3.193 2.602
        3.7879 3.201 2.606
        3.8023 3.208 2.607
        3.8168 3.211 2.613
        3.8314 3.217 2.620
        3.8462 3.225 2.625
        3.8610 3.231 2.626
        3.8760 3.238 2.631
        3.8911 3.244 2.634
        3.9063 3.249 2.639
        3.9216 3.254 2.644
        3.9370 3.261 2.650
        3.9526 3.269 2.654
        3.9683 3.275 2.658
        3.9841 3.283 2.664
        4.0000 3.289 2.666
        4.0161 3.295 2.674
        4.0323 3.305 2.679
        4.0486 3.311 2.682
        4.0650 3.318 2.688
        4.0816 3.328 2.690
        4.0984 3.335 2.694
        4.1152 3.343 2.698
        4.1322 3.352 2.706
        4.1494 3.366 2.708
        4.1667 3.376 2.710
        4.1841 3.392 2.715
        4.2017 3.416 2.701
        4.2194 3.417 2.669
        4.2373 3.383 2.653
        4.2553 3.367 2.678
        4.2735 3.368 2.685
        4.2918 3.361 2.701
        4.3103 3.356 2.720
        4.3290 3.366 2.746
        4.3478 3.379 2.758
        4.3668 3.393 2.772
        4.3860 3.408 2.778
        4.4053 3.419 2.782
        4.4248 3.427 2.788
        4.4444 3.437 2.796
        4.4643 3.447 2.801
        4.4843 3.456 2.806
        4.5045 3.464 2.810
        4.5249 3.471 2.817
        4.5455 3.482 2.822
        4.5662 3.488 2.828
        4.5872 3.498 2.837
        4.6083 3.506 2.845
        4.6296 3.519 2.851
        4.6512 3.528 2.853
        4.6729 3.537 2.859
        4.6948 3.547 2.863
        4.7170 3.556 2.868
        4.7393 3.562 2.872
        4.7619 3.570 2.883
        4.7847 3.581 2.887
        4.8077 3.590 2.894
        4.8309 3.604 2.899
        4.8544 3.610 2.900
        4.8780 3.616 2.907
        4.9020 3.627 2.915
        4.9261 3.639 2.921
        4.9505 3.648 2.923
        4.9751 3.650 2.928
        5.0000 3.653 2.942
        5.0251 3.672 2.959
        5.0505 3.691 2.961
        5.0761 3.702 2.965
        5.1020 3.714 2.970
        5.1282 3.726 2.974
        5.1546 3.738 2.977
        5.1813 3.748 2.982
        5.2083 3.760 2.988
        5.2356 3.773 2.991
        5.2632 3.783 2.994
        5.2910 3.793 3.000
        5.3191 3.807 3.003
        5.3476 3.817 3.006
        5.3763 3.829 3.010
        5.4054 3.838 3.010
        5.4348 3.846 3.017
        5.4645 3.856 3.022
        5.4945 3.869 3.028
        5.5249 3.882 3.030
        5.5556 3.890 3.034
        5.5866 3.902 3.040
        5.6180 3.913 3.040
        5.6497 3.922 3.046
        5.6818 3.935 3.050
        5.7143 3.944 3.051
        5.7471 3.946 3.055
        5.7803 3.959 3.065
        5.8140 3.973 3.069
        5.8480 3.986 3.069
        5.8824 3.991 3.071
        5.9172 4.001 3.081
        5.9524 4.013 3.082
        5.9880 4.019 3.090
        6.0241 4.034 3.095
        6.0606 4.040 3.099
        6.0976 4.054 3.103
        6.1350 4.059 3.105
        6.1728 4.068 3.113
        6.2112 4.073 3.115
        6.2500 4.069 3.129
        6.2893 4.085 3.162
        6.3291 4.125 3.171
        6.3694 4.145 3.161
        6.4103 4.155 3.156
        6.4516 4.162 3.154
        6.4935 4.162 3.162
        6.5359 4.177 3.173
        6.5789 4.189 3.174
        6.6225 4.198 3.180
        6.6667 4.208 3.188
        6.7114 4.220 3.194
        6.7568 4.234 3.201
        6.8027 4.247 3.204
        6.8493 4.256 3.207
        6.8966 4.264 3.218
        6.9444 4.280 3.223
        6.9930 4.288 3.226
        7.0423 4.298 3.235
        7.0922 4.313 3.240
        7.1429 4.322 3.246
        7.1942 4.334 3.255
        7.2464 4.345 3.261
        7.2993 4.359 3.268
        7.3529 4.370 3.273
        7.4074 4.382 3.279
        7.4627 4.393 3.285
        7.5188 4.406 3.291
        7.5758 4.412 3.296
        7.6336 4.423 3.306
        7.6923 4.433 3.314
        7.7519 4.443 3.324
        7.8125 4.457 3.333
        7.8740 4.465 3.336
        7.9365 4.473 3.352
        8.0000 4.490 3.361
        8.0645 4.494 3.370
        8.1301 4.511 3.389
        8.1967 4.528 3.391
        8.2645 4.533 3.401
        8.3333 4.547 3.417
        8.4034 4.564 3.427
        8.4746 4.576 3.437
        8.5470 4.588 3.449
        8.6207 4.600 3.457
        8.6957 4.612 3.474
        8.7719 4.634 3.486
        8.8496 4.647 3.490
        8.9286 4.651 3.501
        9.0090 4.664 3.523
        9.0909 4.684 3.538
        9.1743 4.703 3.553
        9.2593 4.723 3.558
        9.3458 4.729 3.569
        9.4340 4.745 3.585
        9.5238 4.758 3.601
        9.6154 4.779 3.620
        9.7087 4.798 3.630
        9.8039 4.814 3.638
        9.9010 4.825 3.653
        10.0000 4.843 3.670
        10.1010 4.859 3.686
        10.2041 4.878 3.700
        10.3093 4.892 3.716
        10.4167 4.911 3.732
        10.5263 4.924 3.749
        10.6383 4.948 3.770
        10.7527 4.969 3.779
        10.8696 4.986 3.794
        10.9890 5.003 3.807
        11.1111 5.019 3.825
        11.2360 5.035 3.842
        11.3636 5.049 3.854
        11.4943 5.059 3.888
        11.6279 5.099 3.913
        11.7647 5.116 3.917
        11.9048 5.126 3.933
        12.0482 5.140 3.954
        12.1951 5.158 3.978
        12.3457 5.177 4.001
        12.5000 5.196 4.026
        12.6582 5.211 4.046
        12.8205 5.228 4.077
        12.9870 5.255 4.103
        13.1579 5.275 4.125
        13.3333 5.291 4.152
        13.5135 5.311 4.186
        13.6986 5.336 4.211
        13.8889 5.352 4.243
        14.0845 5.381 4.279
        14.2857 5.408 4.301
        14.4928 5.422 4.328
        14.7059 5.441 4.365
        14.9254 5.457 4.405
        15.1515 5.480 4.449
        15.3846 5.501 4.491
        15.6250 5.535 4.544
        15.8730 5.572 4.579
        16.1290 5.596 4.616
        16.3934 5.614 4.664
        16.6667 5.652 4.719
        16.9492 5.681 4.762
        17.2414 5.708 4.813
        17.5439 5.738 4.874
        17.8571 5.781 4.936
        18.1818 5.817 4.984
        18.5185 5.848 5.049
        18.8679 5.884 5.115
        19.2308 5.926 5.193
        19.6078 5.981 5.261
        20.0000 6.023 5.326
        20.4082 6.068 5.410
        20.8333 6.124 5.490
        21.2766 6.182 5.581
        21.7391 6.253 5.663
        22.2222 6.306 5.748
        22.7273 6.372 5.853
        23.2558 6.461 5.946
        23.8095 6.537 6.033
        24.3902 6.611 6.135
        25.0000 6.690 6.252
        25.6410 6.783 6.372
        26.3158 6.888 6.490
        27.0270 6.991 6.620
        27.7778 7.117 6.754
        28.5714 7.242 6.881
        29.4118 7.384 7.040
        30.3030 7.545 7.177
        31.2500 7.699 7.334
        32.2581 7.909 7.502
        33.3333 8.146 7.612
        34.4828 8.307 7.717
        35.7143 8.495 7.897
        37.0370 8.712 8.068
        38.4615 8.938 8.265
        40.0000 9.220 8.502
        41.6667 9.608 8.714
        43.4783 9.937 8.853
        45.4545 10.256 9.141
        47.6190 10.808 9.430
        50.0000 11.393 9.614
        52.6316 12.172 9.771
        55.5556 12.972 9.768