# 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: |
    Pyrolytic carbon (pyrolytic graphite).
DATA:
  - type: tabulated nk
    data: |
        0.2100 1.248 0.411
        0.2200 1.293 0.503
        0.2300 1.361 0.564
        0.2400 1.445 0.601
        0.2500 1.532 0.603
        0.2600 1.607 0.569
        0.2700 1.643 0.511
        0.2800 1.640 0.466
        0.2900 1.626 0.445
        0.3000 1.613 0.436
        0.3100 1.600 0.434
        0.3200 1.589 0.439
        0.3300 1.583 0.447
        0.3400 1.577 0.454
        0.3500 1.570 0.465
        0.3600 1.567 0.470
        0.3700 1.565 0.491
        0.3800 1.564 0.504
        0.3900 1.565 0.517
        0.4000 1.565 0.529
        0.4100 1.566 0.542
        0.4200 1.567 0.556
        0.4300 1.568 0.569
        0.4400 1.571 0.583
        0.4500 1.574 0.596
        0.4600 1.577 0.610
        0.4700 1.581 0.623
        0.4800 1.586 0.636
        0.4900 1.591 0.648
        0.5000 1.596 0.659
        0.5100 1.600 0.669
        0.5200 1.605 0.680
        0.5300 1.608 0.690
        0.5400 1.612 0.700
        0.5500 1.615 0.711
        0.5600 1.618 0.721
        0.5700 1.622 0.732
        0.5800 1.624 0.743
        0.5900 1.627 0.754
        0.6000 1.630 0.765
        0.6100 1.634 0.777
        0.6200 1.637 0.788
        0.6300 1.640 0.800
        0.6400 1.646 0.814
        0.6500 1.651 0.822
        0.6600 1.653 0.832
        0.6700 1.657 0.844
        0.6800 1.661 0.855
        0.6900 1.666 0.866
        0.7000 1.670 0.877
        0.7100 1.675 0.888
        0.7200 1.680 0.898
        0.7300 1.684 0.909
        0.7400 1.689 0.919
        0.7500 1.693 0.929
        0.7600 1.697 0.940
        0.7700 1.702 0.950
        0.7800 1.706 0.960
        0.7900 1.711 0.970
        0.8000 1.716 0.979
        0.8100 1.718 0.988
        0.8200 1.721 0.999
        0.8300 1.725 1.011
        0.8400 1.731 1.022
        0.8500 1.736 1.032
        0.8600 1.741 1.044
        0.8700 1.748 1.054
        0.8800 1.754 1.062
        0.8900 1.758 1.070
        0.9000 1.762 1.080
        0.9100 1.768 1.090
        0.9200 1.773 1.098
        0.9300 1.778 1.107
        0.9400 1.783 1.116
        0.9500 1.787 1.124
        0.9600 1.792 1.132
        0.9700 1.796 1.141
        0.9800 1.800 1.149
        0.9900 1.804 1.158
        1.0000 1.807 1.167
        1.0100 1.811 1.176
        1.0200 1.815 1.185
        1.0300 1.819 1.194
        1.0400 1.823 1.204
        1.0500 1.827 1.213
        1.0600 1.831 1.222
        1.0700 1.836 1.231
        1.0800 1.840 1.240
        1.0900 1.844 1.249
        1.1000 1.848 1.257
        1.1100 1.852 1.266
        1.1200 1.856 1.275
        1.1300 1.859 1.284
        1.1400 1.863 1.293
        1.1500 1.867 1.302
        1.1600 1.871 1.311
        1.1700 1.874 1.321
        1.1800 1.878 1.329
        1.1900 1.880 1.338
        1.2000 1.882 1.352
        1.2100 1.891 1.366
        1.2200 1.898 1.374
        1.2300 1.904 1.382
        1.2400 1.909 1.390
        1.2500 1.914 1.399
        1.2600 1.920 1.407
        1.2700 1.925 1.416
        1.2800 1.930 1.424
        1.2900 1.935 1.432
        1.3000 1.940 1.440
        1.3100 1.945 1.448
        1.3200 1.949 1.456
        1.3300 1.954 1.465
        1.3400 1.958 1.473
        1.3500 1.962 1.482
        1.3600 1.967 1.490
        1.3700 1.971 1.499
        1.3800 1.976 1.508
        1.3900 1.981 1.516
        1.4000 1.986 1.524
        1.4100 1.990 1.533
        1.4200 1.996 1.543
        1.4300 2.001 1.551
        1.4400 2.006 1.559
        1.4500 2.012 1.567
        1.4600 2.017 1.576
        1.4700 2.022 1.584
        1.4800 2.028 1.591
        1.4900 2.032 1.600
        1.5000 2.038 1.608
        1.5100 2.043 1.616
        1.5200 2.050 1.624
        1.5300 2.055 1.630
        1.5400 2.059 1.638
        1.5500 2.066 1.646
        1.5600 2.071 1.652
        1.5700 2.076 1.660
        1.5800 2.081 1.666
        1.5900 2.085 1.673
        1.6000 2.090 1.680
        1.6100 2.094 1.687
        1.6200 2.097 1.694
        1.6300 2.101 1.702
        1.6400 2.105 1.710
        1.6500 2.108 1.720
        1.6600 2.116 1.730
        1.6700 2.124 1.735
        1.6800 2.127 1.741
        1.6900 2.132 1.749
        1.7000 2.137 1.757
        1.7100 2.141 1.765
        1.7200 2.146 1.772
        1.7300 2.151 1.780
        1.7400 2.157 1.788
        1.7500 2.162 1.795
        1.7600 2.168 1.802
        1.7700 2.174 1.809
        1.7800 2.179 1.817
        1.7900 2.184 1.824
        1.8000 2.191 1.831
        1.8100 2.197 1.836
        1.8200 2.202 1.841
        1.8300 2.207 1.848
        1.8400 2.212 1.854
        1.8500 2.217 1.861
        1.8600 2.223 1.864
        1.8700 2.224 1.868
        1.8800 2.227 1.877
        1.8900 2.232 1.884
        1.9000 2.236 1.890
        1.9100 2.239 1.896
        1.9200 2.243 1.903
        1.9300 2.247 1.910
        1.9400 2.251 1.918
        1.9500 2.255 1.925
        1.9600 2.260 1.931
        1.9700 2.263 1.937
        1.9800 2.266 1.944
        1.9900 2.266 1.950
        2.0000 2.266 1.965
        2.0100 2.277 1.979
        2.0200 2.286 1.985
        2.0300 2.293 1.991
        2.0400 2.299 1.997
        2.0500 2.305 2.003
        2.0600 2.311 2.009
        2.0700 2.316 2.015
        2.0800 2.321 2.021
        2.0900 2.327 2.026
        2.1000 2.331 2.032
        2.1100 2.336 2.038
        2.1200 2.341 2.045
        2.1300 2.345 2.051
        2.1400 2.350 2.056
        2.1500 2.354 2.062
        2.1600 2.358 2.069
        2.1700 2.363 2.075
        2.1800 2.367 2.081
        2.1900 2.372 2.087
        2.2000 2.376 2.093
        2.2100 2.379 2.100
        2.2200 2.383 2.107
        2.2300 2.387 2.114
        2.2400 2.391 2.121
        2.2500 2.394 2.129
        2.2600 2.400 2.138
        2.2700 2.406 2.145
        2.2800 2.412 2.153
        2.2900 2.419 2.160
        2.3000 2.426 2.165
        2.3100 2.431 2.170
        2.3200 2.436 2.175
        2.3300 2.440 2.182
        2.3400 2.445 2.189
        2.3500 2.450 2.196
        2.3600 2.456 2.202
        2.3700 2.462 2.208
        2.3800 2.466 2.214
        2.3900 2.472 2.220
        2.4000 2.477 2.226
        2.4100 2.482 2.232
        2.4200 2.487 2.238
        2.4300 2.492 2.245
        2.4400 2.498 2.253
        2.4500 2.504 2.260
        2.4600 2.512 2.267
        2.4700 2.521 2.273
        2.4800 2.530 2.279
        2.4900 2.542 2.285
        2.5000 2.573 2.269
        2.5063 2.551 2.264
        2.5126 2.548 2.268
        2.5189 2.547 2.271
        2.5253 2.545 2.276
        2.5316 2.546 2.282
        2.5381 2.549 2.287
        2.5445 2.552 2.291
        2.5510 2.554 2.293
        2.5575 2.555 2.297
        2.5641 2.556 2.301
        2.5707 2.559 2.306
        2.5773 2.562 2.311
        2.5840 2.565 2.315
        2.5907 2.568 2.318
        2.5974 2.571 2.322
        2.6042 2.572 2.327
        2.6110 2.576 2.331
        2.6178 2.580 2.334
        2.6247 2.582 2.338
        2.6316 2.586 2.341
        2.6385 2.587 2.344
        2.6455 2.589 2.348
        2.6525 2.590 2.354
        2.6596 2.593 2.360
        2.6667 2.597 2.365
        2.6738 2.602 2.370
        2.6810 2.607 2.373
        2.6882 2.610 2.376
        2.6954 2.612 2.378
        2.7027 2.614 2.383
        2.7100 2.615 2.388
        2.7174 2.619 2.395
        2.7248 2.626 2.399
        2.7322 2.630 2.402
        2.7397 2.633 2.405
        2.7473 2.635 2.409
        2.7548 2.639 2.413
        2.7624 2.642 2.418
        2.7701 2.646 2.421
        2.7778 2.648 2.426
        2.7855 2.652 2.431
        2.7933 2.655 2.435
        2.8011 2.659 2.440
        2.8090 2.661 2.445
        2.8169 2.667 2.450
        2.8249 2.671 2.453
        2.8329 2.675 2.457
        2.8409 2.676 2.461
        2.8490 2.682 2.466
        2.8571 2.685 2.470
        2.8653 2.689 2.476
        2.8736 2.694 2.480
        2.8818 2.698 2.484
        2.8902 2.701 2.486
        2.8986 2.703 2.493
        2.9070 2.708 2.498
        2.9155 2.713 2.503
        2.9240 2.718 2.506
        2.9326 2.721 2.509
        2.9412 2.725 2.513
        2.9499 2.728 2.517
        2.9586 2.731 2.521
        2.9674 2.734 2.527
        2.9762 2.739 2.532
        2.9851 2.742 2.537
        2.9940 2.746 2.543
        3.0030 2.751 2.548
        3.0120 2.756 2.552
        3.0211 2.759 2.557
        3.0303 2.765 2.563
        3.0395 2.771 2.567
        3.0488 2.776 2.569
        3.0581 2.778 2.573
        3.0675 2.782 2.579
        3.0769 2.786 2.583
        3.0864 2.791 2.588
        3.0960 2.795 2.592
        3.1056 2.799 2.597
        3.1153 2.803 2.602
        3.1250 2.808 2.607
        3.1348 2.811 2.612
        3.1447 2.815 2.617
        3.1546 2.822 2.621
        3.1646 2.826 2.626
        3.1746 2.830 2.629
        3.1847 2.833 2.636
        3.1949 2.839 2.642
        3.2051 2.845 2.647
        3.2154 2.850 2.649
        3.2258 2.853 2.654
        3.2362 2.856 2.659
        3.2468 2.864 2.665
        3.2573 2.869 2.668
        3.2680 2.873 2.673
        3.2787 2.877 2.676
        3.2895 2.880 2.681
        3.3003 2.884 2.686
        3.3113 2.888 2.692
        3.3223 2.893 2.698
        3.3333 2.899 2.703
        3.3445 2.903 2.707
        3.3557 2.907 2.712
        3.3670 2.911 2.718
        3.3784 2.916 2.724
        3.3898 2.921 2.727
        3.4014 2.923 2.733
        3.4130 2.928 2.740
        3.4247 2.934 2.748
        3.4364 2.942 2.752
        3.4483 2.946 2.756
        3.4602 2.951 2.762
        3.4722 2.956 2.767
        3.4843 2.962 2.773
        3.4965 2.966 2.777
        3.5088 2.971 2.783
        3.5211 2.976 2.788
        3.5336 2.982 2.794
        3.5461 2.987 2.797
        3.5587 2.991 2.803
        3.5714 2.994 2.808
        3.5842 3.000 2.817
        3.5971 3.006 2.821
        3.6101 3.011 2.827
        3.6232 3.015 2.833
        3.6364 3.021 2.840
        3.6496 3.027 2.845
        3.6630 3.033 2.851
        3.6765 3.038 2.856
        3.6900 3.043 2.861
        3.7037 3.047 2.868
        3.7175 3.052 2.875
        3.7313 3.057 2.882
        3.7453 3.065 2.888
        3.7594 3.071 2.894
        3.7736 3.076 2.900
        3.7879 3.082 2.906
        3.8023 3.089 2.912
        3.8168 3.095 2.918
        3.8314 3.101 2.922
        3.8462 3.106 2.927
        3.8610 3.109 2.934
        3.8760 3.114 2.943
        3.8911 3.122 2.949
        3.9063 3.127 2.955
        3.9216 3.132 2.962
        3.9370 3.138 2.969
        3.9526 3.146 2.977
        3.9683 3.152 2.982
        3.9841 3.157 2.989
        4.0000 3.165 2.995
        4.0161 3.170 3.002
        4.0323 3.177 3.009
        4.0486 3.183 3.017
        4.0650 3.190 3.024
        4.0816 3.198 3.028
        4.0984 3.205 3.034
        4.1152 3.210 3.039
        4.1322 3.214 3.045
        4.1494 3.219 3.054
        4.1667 3.225 3.064
        4.1841 3.235 3.073
        4.2017 3.245 3.077
        4.2194 3.251 3.080
        4.2373 3.254 3.086
        4.2553 3.259 3.093
        4.2735 3.266 3.101
        4.2918 3.272 3.107
        4.3103 3.275 3.115
        4.3290 3.280 3.124
        4.3478 3.285 3.134
        4.3668 3.294 3.145
        4.3860 3.302 3.153
        4.4053 3.312 3.160
        4.4248 3.318 3.166
        4.4444 3.324 3.174
        4.4643 3.331 3.181
        4.4843 3.337 3.191
        4.5045 3.345 3.199
        4.5249 3.352 3.208
        4.5455 3.361 3.217
        4.5662 3.368 3.225
        4.5872 3.377 3.231
        4.6083 3.383 3.239
        4.6296 3.388 3.249
        4.6512 3.396 3.258
        4.6729 3.406 3.269
        4.6948 3.414 3.277
        4.7170 3.421 3.284
        4.7393 3.430 3.292
        4.7619 3.438 3.302
        4.7847 3.447 3.307
        4.8077 3.452 3.316
        4.8309 3.460 3.327
        4.8544 3.469 3.335
        4.8780 3.477 3.342
        4.9020 3.482 3.351
        4.9261 3.490 3.359
        4.9505 3.494 3.366
        4.9751 3.491 3.376
        5.0000 3.494 3.399
        5.0251 3.507 3.421
        5.0505 3.526 3.437
        5.0761 3.541 3.444
        5.1020 3.554 3.452
        5.1282 3.563 3.463
        5.1546 3.576 3.474
        5.1813 3.588 3.483
        5.2083 3.602 3.490
        5.2356 3.611 3.498
        5.2632 3.618 3.507
        5.2910 3.628 3.519
        5.3191 3.640 3.531
        5.3476 3.652 3.540
        5.3763 3.664 3.549
        5.4054 3.675 3.558
        5.4348 3.684 3.566
        5.4645 3.693 3.576
        5.4945 3.703 3.589
        5.5249 3.714 3.600
        5.5556 3.727 3.610
        5.5866 3.737 3.622
        5.6180 3.748 3.631
        5.6497 3.757 3.643
        5.6818 3.769 3.654
        5.7143 3.779 3.667
        5.7471 3.793 3.680
        5.7803 3.806 3.690
        5.8140 3.817 3.701
        5.8480 3.829 3.715
        5.8824 3.843 3.728
        5.9172 3.858 3.740
        5.9524 3.874 3.749
        5.9880 3.886 3.760
        6.0241 3.899 3.768
        6.0606 3.909 3.780
        6.0976 3.925 3.792
        6.1350 3.939 3.799
        6.1728 3.951 3.806
        6.2112 3.956 3.815
        6.2500 3.961 3.829
        6.2893 3.969 3.850
        6.3291 3.987 3.872
        6.3694 4.010 3.888
        6.4103 4.028 3.895
        6.4516 4.043 3.904
        6.4935 4.052 3.918
        6.5359 4.069 3.931
        6.5789 4.085 3.943
        6.6225 4.103 3.955
        6.6667 4.117 3.964
        6.7114 4.130 3.975
        6.7568 4.138 3.989
        6.8027 4.155 4.006
        6.8493 4.173 4.020
        6.8966 4.190 4.031
        6.9444 4.203 4.043
        6.9930 4.220 4.061
        7.0423 4.239 4.070
        7.0922 4.254 4.079
        7.1429 4.266 4.091
        7.1942 4.280 4.107
        7.2464 4.296 4.119
        7.2993 4.310 4.134
        7.3529 4.327 4.148
        7.4074 4.342 4.161
        7.4627 4.357 4.175
        7.5188 4.373 4.190
        7.5758 4.386 4.205
        7.6336 4.404 4.219
        7.6923 4.419 4.235
        7.7519 4.436 4.250
        7.8125 4.448 4.265
        7.8740 4.464 4.283
        7.9365 4.480 4.297
        8.0000 4.495 4.316
        8.0645 4.506 4.332
        8.1301 4.523 4.356
        8.1967 4.541 4.377
        8.2645 4.561 4.400
        8.3333 4.586 4.419
        8.4034 4.605 4.434
        8.4746 4.626 4.453
        8.5470 4.646 4.471
        8.6207 4.662 4.486
        8.6957 4.678 4.505
        8.7719 4.697 4.528
        8.8496 4.717 4.551
        8.9286 4.738 4.569
        9.0090 4.755 4.589
        9.0909 4.775 4.617
        9.1743 4.798 4.640
        9.2593 4.824 4.662
        9.3458 4.845 4.683
        9.4340 4.869 4.705
        9.5238 4.889 4.727
        9.6154 4.915 4.751
        9.7087 4.937 4.774
        9.8039 4.961 4.799
        9.9010 4.988 4.822
        10.0000 5.014 4.844
        10.1010 5.037 4.863
        10.2041 5.058 4.885
        10.3093 5.079 4.909
        10.4167 5.098 4.934
        10.5263 5.120 4.966
        10.6383 5.150 4.995
        10.7527 5.175 5.020
        10.8696 5.195 5.044
        10.9890 5.216 5.077
        11.1111 5.240 5.112
        11.2360 5.269 5.144
        11.3636 5.294 5.173
        11.4943 5.317 5.208
        11.6279 5.342 5.247
        11.7647 5.373 5.286
        11.9048 5.401 5.323
        12.0482 5.430 5.367
        12.1951 5.463 5.407
        12.3457 5.499 5.449
        12.5000 5.535 5.491
        12.6582 5.571 5.527
        12.8205 5.601 5.570
        12.9870 5.639 5.618
        13.1579 5.678 5.664
        13.3333 5.720 5.705
        13.5135 5.755 5.751
        13.6986 5.794 5.799
        13.8889 5.833 5.847
        14.0845 5.878 5.898
        14.2857 5.908 5.948
        14.4928 5.950 6.016
        14.7059 6.005 6.080
        14.9254 6.059 6.134
        15.1515 6.102 6.187
        15.3846 6.136 6.247
        15.6250 6.171 6.338
        15.8730 6.240 6.442
        16.1290 6.334 6.535
        16.3934 6.434 6.602
        16.6667 6.521 6.661
        16.9492 6.607 6.723
        17.2414 6.695 6.780
        17.5439 6.779 6.842
        17.8571 6.871 6.904
        18.1818 6.962 6.960
        18.5185 7.050 7.016
        18.8679 7.128 7.072
        19.2308 7.208 7.137
        19.6078 7.290 7.223
        20.0000 7.367 7.299
        20.4082 7.451 7.406
        20.8333 7.566 7.524
        21.2766 7.695 7.629
        21.7391 7.830 7.720
        22.2222 7.963 7.818
        22.7273 8.109 7.934
        23.2558 8.276 8.037
        23.8095 8.450 8.135
        24.3902 8.636 8.232
        25.0000 8.840 8.322
        25.6410 9.042 8.384
        26.3158 9.233 8.444
        27.0270 9.409 8.524
        27.7778 9.618 8.625
        28.5714 9.835 8.710
        29.4118 10.072 8.814
        30.3030 10.332 8.901
        31.2500 10.614 8.966
        32.2581 10.868 9.033
        33.3333 11.156 9.117
        34.4828 11.487 9.217
        35.7143 11.876 9.266
        37.0370 12.246 9.253
        38.4615 12.621 9.270
        40.0000 13.029 9.235
        41.6667 13.396 9.144
        43.4783 13.742 9.110
        45.4545 14.194 9.101
        47.6190 14.597 8.938
        50.0000 14.955 8.878
        52.6316 15.416 8.874
        55.5556 16.092 8.794