# 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: |
    Intercalated graphite pellet from Asbury 3222 powder.
DATA:
  - type: tabulated nk
    data: |
        0.2000 0.827 0.761
        0.2100 0.875 0.881
        0.2200 0.918 1.022
        0.2300 0.998 1.167
        0.2400 1.125 1.312
        0.2500 1.325 1.416
        0.2600 1.548 1.413
        0.2700 1.707 1.333
        0.2800 1.802 1.243
        0.2900 1.859 1.162
        0.3000 1.892 1.094
        0.3100 1.908 1.038
        0.3200 1.916 1.000
        0.3300 1.928 0.970
        0.3400 1.934 0.937
        0.3500 1.930 0.914
        0.3600 1.927 0.902
        0.3700 1.927 0.895
        0.3800 1.936 0.890
        0.3900 1.935 0.884
        0.4000 1.940 0.879
        0.4100 1.942 0.873
        0.4200 1.942 0.870
        0.4300 1.943 0.870
        0.4400 1.944 0.872
        0.4500 1.947 0.875
        0.4600 1.951 0.879
        0.4700 1.956 0.882
        0.4800 1.961 0.886
        0.4900 1.967 0.888
        0.5000 1.972 0.890
        0.5100 1.976 0.891
        0.5200 1.980 0.896
        0.5300 1.984 0.900
        0.5400 1.987 0.903
        0.5500 1.990 0.907
        0.5600 1.993 0.912
        0.5700 1.997 0.919
        0.5800 2.002 0.923
        0.5900 2.005 0.928
        0.6000 2.009 0.933
        0.6100 2.012 0.940
        0.6200 2.016 0.945
        0.6300 2.020 0.954
        0.6400 2.028 0.960
        0.6500 2.033 0.961
        0.6600 2.033 0.966
        0.6700 2.036 0.974
        0.6800 2.040 0.982
        0.6900 2.045 0.989
        0.7000 2.050 0.995
        0.7100 2.055 1.002
        0.7200 2.059 1.008
        0.7300 2.064 1.014
        0.7400 2.067 1.020
        0.7500 2.072 1.028
        0.7600 2.078 1.035
        0.7700 2.083 1.040
        0.7800 2.088 1.046
        0.7900 2.092 1.051
        0.8000 2.097 1.056
        0.8100 2.100 1.061
        0.8200 2.103 1.067
        0.8300 2.106 1.074
        0.8400 2.110 1.082
        0.8500 2.115 1.088
        0.8600 2.119 1.094
        0.8700 2.124 1.099
        0.8800 2.128 1.103
        0.8900 2.129 1.108
        0.9000 2.131 1.115
        0.9100 2.134 1.123
        0.9200 2.138 1.130
        0.9300 2.141 1.136
        0.9402 2.145 1.142
        0.9500 2.147 1.149
        0.9600 2.150 1.156
        0.9700 2.154 1.162
        0.9800 2.156 1.168
        0.9900 2.158 1.175
        1.0000 2.161 1.183
        1.0100 2.163 1.190
        1.0200 2.165 1.198
        1.0300 2.168 1.206
        1.0400 2.171 1.214
        1.0500 2.175 1.222
        1.0600 2.178 1.230
        1.0700 2.182 1.236
        1.0800 2.185 1.246
        1.0900 2.189 1.253
        1.1000 2.191 1.260
        1.1100 2.194 1.260
        1.1200 2.197 1.277
        1.1300 2.200 1.286
        1.1400 2.205 1.295
        1.1500 2.209 1.303
        1.1600 2.212 1.311
        1.1700 2.215 1.319
        1.1800 2.219 1.327
        1.1900 2.221 1.335
        1.2000 2.223 1.347
        1.2100 2.230 1.359
        1.2200 2.237 1.366
        1.2300 2.242 1.374
        1.2400 2.248 1.382
        1.2500 2.253 1.390
        1.2600 2.258 1.397
        1.2700 2.264 1.405
        1.2800 2.268 1.412
        1.2900 2.273 1.419
        1.3000 2.277 1.427
        1.3100 2.282 1.435
        1.3200 2.287 1.443
        1.3304 2.292 1.450
        1.3400 2.297 1.458
        1.3500 2.303 1.466
        1.3600 2.307 1.473
        1.3700 2.312 1.480
        1.3800 2.317 1.488
        1.3900 2.322 1.496
        1.4000 2.328 1.504
        1.4100 2.333 1.512
        1.4200 2.339 1.519
        1.4300 2.344 1.526
        1.4400 2.350 1.534
        1.4500 2.356 1.541
        1.4600 2.362 1.548
        1.4700 2.368 1.555
        1.4800 2.374 1.561
        1.4900 2.380 1.568
        1.5000 2.386 1.574
        1.5100 2.392 1.580
        1.5200 2.397 1.586
        1.5347 2.403 1.591
        1.5400 2.407 1.597
        1.5500 2.413 1.604
        1.5600 2.419 1.609
        1.5700 2.423 1.614
        1.5800 2.428 1.619
        1.5900 2.431 1.626
        1.6000 2.436 1.632
        1.6100 2.441 1.638
        1.6200 2.445 1.645
        1.6300 2.450 1.651
        1.6400 2.455 1.658
        1.6500 2.459 1.664
        1.6600 2.464 1.670
        1.6700 2.468 1.677
        1.6800 2.473 1.684
        1.6900 2.478 1.691
        1.7000 2.484 1.697
        1.7100 2.488 1.704
        1.7200 2.494 1.711
        1.7300 2.500 1.718
        1.7400 2.505 1.724
        1.7500 2.512 1.730
        1.7600 2.517 1.736
        1.7700 2.523 1.742
        1.7800 2.529 1.748
        1.7900 2.535 1.753
        1.8000 2.542 1.758
        1.8100 2.548 1.762
        1.8200 2.552 1.767
        1.8300 2.557 1.773
        1.8400 2.564 1.778
        1.8500 2.571 1.782
        1.8600 2.576 1.784
        1.8700 2.577 1.787
        1.8800 2.580 1.794
        1.8900 2.585 1.799
        1.9000 2.589 1.805
        1.9100 2.593 1.810
        1.9200 2.598 1.816
        1.9300 2.603 1.822
        1.9400 2.608 1.827
        1.9500 2.613 1.831
        1.9600 2.618 1.836
        1.9700 2.622 1.840
        1.9800 2.626 1.845
        1.9900 2.629 1.849
        2.0000 2.631 1.857
        2.0100 2.638 1.865
        2.0200 2.645 1.869
        2.0300 2.650 1.873
        2.0400 2.654 1.877
        2.0500 2.659 1.882
        2.0600 2.663 1.886
        2.0700 2.667 1.891
        2.0800 2.671 1.896
        2.0900 2.676 1.901
        2.1000 2.681 1.905
        2.1100 2.685 1.910
        2.1200 2.689 1.914
        2.1300 2.693 1.918
        2.1400 2.697 1.923
        2.1500 2.700 1.927
        2.1600 2.704 1.932
        2.1700 2.708 1.937
        2.1800 2.712 1.940
        2.1900 2.714 1.945
        2.2000 2.717 1.950
        2.2100 2.720 1.955
        2.2200 2.724 1.961
        2.2300 2.727 1.966
        2.2400 2.730 1.971
        2.2500 2.732 1.977
        2.2600 2.735 1.984
        2.2700 2.738 1.992
        2.2800 2.744 2.000
        2.2900 2.751 2.006
        2.3000 2.761 2.012
        2.3100 2.766 2.011
        2.3200 2.768 2.014
        2.3300 2.770 2.019
        2.3400 2.774 2.025
        2.3500 2.778 2.030
        2.3600 2.782 2.035
        2.3700 2.785 2.040
        2.3800 2.790 2.045
        2.3900 2.794 2.049
        2.4000 2.798 2.054
        2.4100 2.802 2.058
        2.4200 2.805 2.063
        2.4300 2.808 2.068
        2.4400 2.811 2.073
        2.4500 2.814 2.079
        2.4600 2.818 2.085
        2.4700 2.823 2.091
        2.4800 2.828 2.096
        2.4900 2.833 2.101
        2.5000 2.837 2.104
        2.5063 2.838 2.108
        2.5126 2.842 2.111
        2.5189 2.845 2.113
        2.5253 2.846 2.116
        2.5316 2.847 2.119
        2.5381 2.849 2.123
        2.5445 2.852 2.128
        2.5510 2.856 2.130
        2.5575 2.857 2.134
        2.5641 2.862 2.137
        2.5707 2.865 2.139
        2.5773 2.867 2.141
        2.5840 2.868 2.145
        2.5907 2.871 2.150
        2.5974 2.874 2.153
        2.6042 2.878 2.155
        2.6110 2.880 2.156
        2.6178 2.881 2.160
        2.6247 2.883 2.164
        2.6316 2.886 2.168
        2.6385 2.888 2.171
        2.6455 2.890 2.175
        2.6525 2.894 2.179
        2.6596 2.896 2.182
        2.6667 2.898 2.187
        2.6738 2.904 2.190
        2.6810 2.907 2.192
        2.6882 2.908 2.192
        2.6954 2.906 2.197
        2.7027 2.908 2.204
        2.7100 2.912 2.210
        2.7174 2.916 2.213
        2.7248 2.918 2.217
        2.7322 2.922 2.221
        2.7397 2.926 2.226
        2.7473 2.930 2.229
        2.7548 2.933 2.233
        2.7624 2.935 2.237
        2.7701 2.939 2.241
        2.7778 2.944 2.245
        2.7855 2.947 2.248
        2.7933 2.949 2.251
        2.8011 2.952 2.256
        2.8090 2.956 2.260
        2.8169 2.961 2.263
        2.8249 2.962 2.265
        2.8329 2.964 2.269
        2.8409 2.967 2.274
        2.8490 2.970 2.279
        2.8571 2.974 2.283
        2.8653 2.977 2.288
        2.8736 2.982 2.293
        2.8818 2.986 2.296
        2.8902 2.989 2.299
        2.8986 2.992 2.303
        2.9070 2.996 2.308
        2.9155 3.000 2.311
        2.9240 3.002 2.314
        2.9326 3.005 2.320
        2.9412 3.010 2.325
        2.9499 3.015 2.328
        2.9586 3.020 2.331
        2.9674 3.021 2.333
        2.9762 3.024 2.338
        2.9851 3.028 2.342
        2.9940 3.030 2.346
        3.0030 3.033 2.350
        3.0120 3.035 2.357
        3.0211 3.039 2.363
        3.0303 3.043 2.370
        3.0395 3.051 2.375
        3.0488 3.056 2.378
        3.0581 3.061 2.380
        3.0675 3.064 2.384
        3.0769 3.067 2.389
        3.0864 3.071 2.395
        3.0960 3.077 2.400
        3.1056 3.083 2.404
        3.1153 3.089 2.407
        3.1250 3.093 2.410
        3.1348 3.097 2.413
        3.1447 3.100 2.418
        3.1546 3.104 2.423
        3.1646 3.110 2.427
        3.1746 3.116 2.430
        3.1847 3.119 2.433
        3.1949 3.123 2.436
        3.2051 3.127 2.441
        3.2154 3.131 2.443
        3.2258 3.132 2.448
        3.2362 3.138 2.456
        3.2468 3.144 2.460
        3.2573 3.150 2.463
        3.2680 3.154 2.467
        3.2787 3.160 2.473
        3.2895 3.165 2.473
        3.3003 3.169 2.478
        3.3113 3.172 2.482
        3.3223 3.178 2.486
        3.3333 3.184 2.489
        3.3445 3.187 2.492
        3.3557 3.191 2.497
        3.3670 3.195 2.501
        3.3784 3.201 2.504
        3.3898 3.204 2.507
        3.4014 3.206 2.512
        3.4130 3.212 2.517
        3.4247 3.216 2.522
        3.4364 3.222 2.524
        3.4483 3.223 2.529
        3.4602 3.228 2.533
        3.4722 3.231 2.540
        3.4843 3.237 2.544
        3.4965 3.240 2.548
        3.5088 3.244 2.555
        3.5211 3.251 2.562
        3.5336 3.260 2.566
        3.5461 3.265 2.567
        3.5587 3.268 2.570
        3.5714 3.273 2.574
        3.5842 3.277 2.579
        3.5971 3.281 2.582
        3.6101 3.285 2.588
        3.6232 3.290 2.592
        3.6364 3.294 2.596
        3.6496 3.299 2.600
        3.6630 3.304 2.604
        3.6765 3.306 2.607
        3.6900 3.308 2.614
        3.7037 3.313 2.620
        3.7175 3.319 2.627
        3.7313 3.324 2.629
        3.7453 3.326 2.635
        3.7594 3.331 2.640
        3.7736 3.335 2.648
        3.7879 3.341 2.653
        3.8023 3.346 2.659
        3.8168 3.351 2.662
        3.8314 3.353 2.670
        3.8462 3.359 2.678
        3.8610 3.366 2.685
        3.8760 3.374 2.689
        3.8911 3.380 2.693
        3.9063 3.384 2.698
        3.9216 3.389 2.704
        3.9370 3.394 2.710
        3.9526 3.400 2.715
        3.9683 3.403 2.720
        3.9841 3.408 2.728
        4.0000 3.414 2.735
        4.0161 3.421 2.742
        4.0323 3.428 2.747
        4.0486 3.435 2.752
        4.0650 3.440 2.756
        4.0816 3.445 2.764
        4.0984 3.452 2.768
        4.1152 3.457 2.776
        4.1322 3.465 2.782
        4.1494 3.472 2.788
        4.1667 3.479 2.790
        4.1841 3.483 2.796
        4.2017 3.488 2.801
        4.2194 3.494 2.807
        4.2373 3.497 2.813
        4.2553 3.502 2.822
        4.2735 3.512 2.829
        4.2918 3.519 2.834
        4.3103 3.525 2.837
        4.3290 3.528 2.844
        4.3478 3.536 2.853
        4.3668 3.544 2.858
        4.3860 3.550 2.863
        4.4053 3.555 2.868
        4.4248 3.560 2.875
        4.4444 3.566 2.882
        4.4643 3.571 2.889
        4.4843 3.577 2.896
        4.5045 3.584 2.904
        4.5249 3.591 2.912
        4.5455 3.599 2.918
        4.5662 3.606 2.925
        4.5872 3.612 2.931
        4.6083 3.619 2.939
        4.6296 3.627 2.945
        4.6512 3.634 2.951
        4.6729 3.640 2.957
        4.6948 3.645 2.964
        4.7170 3.651 2.972
        4.7393 3.658 2.981
        4.7619 3.665 2.989
        4.7847 3.672 2.997
        4.8077 3.682 3.006
        4.8309 3.690 3.012
        4.8544 3.698 3.018
        4.8780 3.707 3.025
        4.9020 3.714 3.029
        4.9261 3.719 3.035
        4.9505 3.724 3.041
        4.9751 3.726 3.051
        5.0000 3.732 3.064
        5.0251 3.741 3.077
        5.0505 3.753 3.089
        5.0761 3.766 3.095
        5.1020 3.777 3.102
        5.1282 3.785 3.107
        5.1546 3.793 3.114
        5.1813 3.801 3.122
        5.2083 3.809 3.130
        5.2356 3.819 3.139
        5.2632 3.829 3.146
        5.2910 3.838 3.153
        5.3191 3.847 3.160
        5.3476 3.856 3.167
        5.3763 3.865 3.174
        5.4054 3.874 3.181
        5.4348 3.882 3.187
        5.4645 3.889 3.195
        5.4945 3.897 3.204
        5.5249 3.906 3.212
        5.5556 3.915 3.218
        5.5866 3.922 3.226
        5.6180 3.930 3.234
        5.6497 3.938 3.243
        5.6818 3.946 3.250
        5.7143 3.952 3.260
        5.7471 3.962 3.270
        5.7803 3.970 3.279
        5.8140 3.979 3.289
        5.8480 3.990 3.300
        5.8824 4.001 3.309
        5.9172 4.012 3.315
        5.9524 4.020 3.320
        5.9880 4.025 3.329
        6.0241 4.031 3.339
        6.0606 4.039 3.348
        6.0976 4.047 3.357
        6.1350 4.050 3.363
        6.1728 4.049 3.374
        6.2112 4.037 3.394
        6.2500 4.042 3.447
        6.2893 4.089 3.490
        6.3291 4.149 3.493
        6.3694 4.182 3.460
        6.4103 4.177 3.445
        6.4516 4.178 3.448
        6.4935 4.181 3.454
        6.5359 4.185 3.461
        6.5789 4.192 3.473
        6.6225 4.203 3.481
        6.6667 4.210 3.484
        6.7114 4.212 3.490
        6.7568 4.212 3.505
        6.8027 4.219 3.519
        6.8493 4.225 3.534
        6.8966 4.234 3.550
        6.9444 4.244 3.568
        6.9930 4.259 3.587
        7.0423 4.279 3.599
        7.0922 4.296 3.604
        7.1429 4.309 3.605
        7.1942 4.314 3.609
        7.2464 4.320 3.617
        7.2993 4.325 3.625
        7.3529 4.329 3.633
        7.4074 4.331 3.643
        7.4627 4.332 3.654
        7.5188 4.330 3.670
        7.5758 4.332 3.688
        7.6336 4.334 3.708
        7.6923 4.339 3.726
        7.7519 4.339 3.745
        7.8125 4.341 3.766
        7.8740 4.342 3.792
        7.9365 4.344 3.819
        8.0000 4.346 3.850
        8.0645 4.353 3.887
        8.1301 4.365 3.925
        8.1967 4.383 3.963
        8.2645 4.407 3.998
        8.3333 4.434 4.030
        8.4034 4.464 4.054
        8.4746 4.491 4.073
        8.5470 4.512 4.091
        8.6207 4.529 4.108
        8.6957 4.545 4.129
        8.7719 4.557 4.158
        8.8496 4.577 4.190
        8.9286 4.604 4.218
        9.0090 4.629 4.241
        9.0909 4.646 4.264
        9.1743 4.664 4.296
        9.2593 4.692 4.336
        9.3458 4.726 4.372
        9.4340 4.773 4.400
        9.5238 4.815 4.420
        9.6154 4.859 4.436
        9.7087 4.901 4.442
        9.8039 4.939 4.445
        9.9010 4.967 4.440
        10.0000 4.986 4.438
        10.1010 4.999 4.441
        10.2041 5.007 4.451
        10.3093 5.018 4.465
        10.4167 5.026 4.481
        10.5263 5.031 4.506
        10.6383 5.044 4.535
        10.7527 5.065 4.565
        10.8696 5.082 4.590
        10.9890 5.100 4.618
        11.1111 5.121 4.646
        11.2360 5.142 4.672
        11.3636 5.159 4.703
        11.4943 5.183 4.739
        11.6279 5.213 4.766
        11.7647 5.239 4.790
        11.9048 5.259 4.813
        12.0482 5.279 4.841
        12.1951 5.297 4.869
        12.3457 5.313 4.904
        12.5000 5.334 4.941
        12.6582 5.356 4.979
        12.8205 5.383 5.015
        12.9870 5.407 5.049
        13.1579 5.430 5.084
        13.3333 5.450 5.121
        13.5135 5.473 5.166
        13.6986 5.501 5.205
        13.8889 5.524 5.244
        14.0845 5.545 5.284
        14.2857 5.556 5.330
        14.4928 5.575 5.391
        14.7059 5.602 5.452
        14.9254 5.633 5.514
        15.1515 5.674 5.574
        15.3846 5.711 5.629
        15.6250 5.750 5.679
        15.8730 5.776 5.727
        16.1290 5.797 5.786
        16.3934 5.809 5.848
        16.6667 5.819 5.946
        16.9492 5.860 6.061
        17.2414 5.937 6.166
        17.5439 6.020 6.239
        17.8571 6.080 6.296
        18.1818 6.129 6.368
        18.5185 6.187 6.451
        18.8679 6.245 6.526
        19.2308 6.300 6.603
        19.6078 6.343 6.685
        20.0000 6.384 6.792
        20.4082 6.440 6.915
        20.8333 6.518 7.048
        21.2766 6.616 7.176
        21.7391 6.727 7.299
        22.2222 6.851 7.403
        22.7273 6.970 7.491
        23.2558 7.066 7.572
        23.8095 7.158 7.667
        24.3902 7.237 7.776
        25.0000 7.320 7.904
        25.6410 7.418 8.049
        26.3158 7.534 8.212
        27.0270 7.669 8.363
        27.7778 7.809 8.512
        28.5714 7.942 8.669
        29.4118 8.083 8.856
        30.3030 8.254 9.045
        31.2500 8.444 9.229
        32.2581 8.627 9.409
        33.3333 8.812 9.603
        34.4828 9.006 9.822
        35.7143 9.210 10.068
        37.0370 9.416 10.344
        38.4615 9.671 10.730
        40.0000 10.090 11.118
        41.6667 10.560 11.415
        43.4783 10.975 11.680
        45.4545 11.460 12.115
        47.6190 12.169 12.505
        50.0000 12.951 12.751
        52.6316 13.767 12.971
        55.5556 14.770 13.212