# 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: |
    Magnetite.
DATA:
  - type: tabulated nk
    data: |
        0.2100 2.256 0.085
        0.2200 2.305 0.109
        0.2300 2.337 0.118
        0.2400 2.364 0.120
        0.2500 2.387 0.114
        0.2600 2.400 0.102
        0.2700 2.404 0.092
        0.2800 2.401 0.085
        0.2900 2.397 0.088
        0.3000 2.398 0.091
        0.3100 2.398 0.096
        0.3200 2.403 0.103
        0.3300 2.409 0.105
        0.3400 2.415 0.108
        0.3500 2.422 0.111
        0.3600 2.434 0.112
        0.3700 2.447 0.108
        0.3800 2.459 0.096
        0.3900 2.464 0.080
        0.4000 2.462 0.062
        0.4100 2.453 0.047
        0.4200 2.440 0.034
        0.4300 2.423 0.026
        0.4400 2.404 0.026
        0.4500 2.386 0.032
        0.4600 2.374 0.042
        0.4700 2.367 0.054
        0.4800 2.365 0.063
        0.4900 2.364 0.067
        0.5000 2.359 0.071
        0.5100 2.354 0.077
        0.5200 2.349 0.083
        0.5300 2.346 0.091
        0.5400 2.344 0.099
        0.5500 2.343 0.105
        0.5600 2.342 0.112
        0.5700 2.342 0.118
        0.5800 2.342 0.125
        0.5900 2.344 0.131
        0.6000 2.346 0.136
        0.6100 2.350 0.141
        0.6200 2.353 0.144
        0.6300 2.358 0.148
        0.6400 2.366 0.145
        0.6500 2.366 0.138
        0.6600 2.363 0.137
        0.6700 2.364 0.135
        0.6800 2.362 0.131
        0.6900 2.359 0.127
        0.7000 2.355 0.124
        0.7100 2.349 0.122
        0.7200 2.343 0.120
        0.7300 2.336 0.119
        0.7400 2.329 0.118
        0.7500 2.320 0.118
        0.7600 2.312 0.119
        0.7700 2.303 0.120
        0.7800 2.294 0.123
        0.7900 2.284 0.128
        0.8000 2.279 0.134
        0.8100 2.272 0.134
        0.8200 2.262 0.138
        0.8300 2.253 0.143
        0.8400 2.245 0.149
        0.8500 2.236 0.155
        0.8600 2.229 0.161
        0.8700 2.222 0.167
        0.8800 2.213 0.173
        0.8900 2.205 0.181
        0.9000 2.196 0.189
        0.9100 2.189 0.198
        0.9200 2.182 0.207
        0.9300 2.175 0.215
        0.9400 2.168 0.223
        0.9500 2.159 0.234
        0.9600 2.153 0.244
        0.9700 2.146 0.255
        0.9800 2.139 0.267
        0.9900 2.134 0.280
        1.0000 2.130 0.292
        1.0100 2.125 0.305
        1.0200 2.122 0.317
        1.0300 2.119 0.329
        1.0400 2.116 0.341
        1.0500 2.114 0.353
        1.0600 2.112 0.365
        1.0700 2.110 0.377
        1.0800 2.108 0.389
        1.0900 2.107 0.401
        1.1000 2.106 0.413
        1.1100 2.104 0.424
        1.1200 2.103 0.437
        1.1300 2.102 0.450
        1.1400 2.102 0.462
        1.1500 2.102 0.475
        1.1600 2.102 0.487
        1.1700 2.103 0.500
        1.1800 2.104 0.512
        1.1900 2.103 0.525
        1.2000 2.106 0.542
        1.2100 2.114 0.554
        1.2200 2.117 0.564
        1.2300 2.120 0.574
        1.2400 2.123 0.584
        1.2500 2.126 0.595
        1.2600 2.129 0.605
        1.2700 2.132 0.616
        1.2800 2.135 0.626
        1.2900 2.139 0.637
        1.3000 2.143 0.647
        1.3100 2.146 0.657
        1.3200 2.149 0.667
        1.3300 2.153 0.678
        1.3400 2.158 0.688
        1.3500 2.162 0.698
        1.3600 2.166 0.708
        1.3700 2.171 0.718
        1.3800 2.176 0.728
        1.3900 2.181 0.737
        1.4000 2.186 0.747
        1.4100 2.192 0.757
        1.4200 2.198 0.765
        1.4300 2.203 0.774
        1.4400 2.209 0.783
        1.4500 2.215 0.791
        1.4600 2.221 0.800
        1.4700 2.227 0.808
        1.4800 2.233 0.816
        1.4900 2.240 0.824
        1.5000 2.246 0.831
        1.5100 2.252 0.839
        1.5200 2.259 0.846
        1.5300 2.265 0.852
        1.5400 2.270 0.860
        1.5500 2.278 0.867
        1.5600 2.284 0.872
        1.5700 2.290 0.879
        1.5800 2.295 0.885
        1.5900 2.301 0.892
        1.6000 2.308 0.898
        1.6100 2.314 0.904
        1.6200 2.319 0.910
        1.6300 2.325 0.917
        1.6400 2.331 0.923
        1.6500 2.337 0.929
        1.6600 2.343 0.935
        1.6700 2.350 0.942
        1.6800 2.357 0.947
        1.6900 2.364 0.953
        1.7000 2.371 0.959
        1.7100 2.378 0.964
        1.7200 2.385 0.969
        1.7300 2.391 0.974
        1.7400 2.398 0.979
        1.7500 2.405 0.983
        1.7600 2.412 0.987
        1.7700 2.419 0.991
        1.7800 2.425 0.996
        1.7900 2.432 1.000
        1.8000 2.441 1.003
        1.8100 2.446 1.004
        1.8200 2.451 1.008
        1.8300 2.457 1.012
        1.8400 2.464 1.015
        1.8500 2.471 1.017
        1.8600 2.474 1.017
        1.8700 2.475 1.021
        1.8800 2.480 1.028
        1.8900 2.487 1.033
        1.9000 2.492 1.037
        1.9100 2.498 1.041
        1.9200 2.504 1.044
        1.9300 2.510 1.048
        1.9400 2.515 1.052
        1.9500 2.521 1.056
        1.9600 2.527 1.058
        1.9700 2.532 1.061
        1.9800 2.536 1.065
        1.9900 2.539 1.069
        2.0000 2.545 1.080
        2.0100 2.558 1.084
        2.0200 2.566 1.085
        2.0300 2.573 1.086
        2.0400 2.580 1.088
        2.0500 2.586 1.089
        2.0600 2.592 1.090
        2.0700 2.597 1.092
        2.0800 2.603 1.094
        2.0900 2.608 1.095
        2.1000 2.613 1.097
        2.1100 2.619 1.099
        2.1200 2.624 1.100
        2.1300 2.629 1.102
        2.1400 2.633 1.104
        2.1500 2.638 1.106
        2.1600 2.643 1.109
        2.1700 2.648 1.110
        2.1800 2.653 1.112
        2.1900 2.657 1.114
        2.2000 2.662 1.116
        2.2100 2.666 1.118
        2.2200 2.671 1.121
        2.2300 2.675 1.124
        2.2400 2.680 1.127
        2.2500 2.685 1.131
        2.2600 2.693 1.134
        2.2700 2.699 1.136
        2.2800 2.706 1.137
        2.2900 2.713 1.137
        2.3000 2.718 1.137
        2.3100 2.722 1.137
        2.3200 2.726 1.138
        2.3300 2.730 1.140
        2.3400 2.735 1.142
        2.3500 2.741 1.144
        2.3600 2.747 1.144
        2.3700 2.751 1.144
        2.3800 2.754 1.145
        2.3900 2.758 1.146
        2.4000 2.763 1.147
        2.4100 2.767 1.149
        2.4200 2.771 1.151
        2.4300 2.776 1.152
        2.4400 2.780 1.154
        2.4500 2.785 1.156
        2.4600 2.791 1.157
        2.4700 2.797 1.157
        2.4800 2.801 1.157
        2.4900 2.805 1.158
        2.5000 2.811 1.158
        2.5063 2.813 1.156
        2.5126 2.812 1.158
        2.5189 2.816 1.160
        2.5253 2.818 1.158
        2.5316 2.821 1.161
        2.5381 2.826 1.161
        2.5445 2.825 1.161
        2.5510 2.831 1.161
        2.5575 2.833 1.160
        2.5641 2.834 1.161
        2.5707 2.837 1.162
        2.5773 2.837 1.160
        2.5840 2.839 1.166
        2.5907 2.844 1.163
        2.5974 2.843 1.166
        2.6042 2.851 1.168
        2.6110 2.852 1.165
        2.6178 2.852 1.169
        2.6247 2.857 1.167
        2.6316 2.857 1.168
        2.6385 2.863 1.168
        2.6455 2.864 1.169
        2.6525 2.867 1.171
        2.6596 2.869 1.170
        2.6667 2.870 1.173
        2.6738 2.874 1.174
        2.6810 2.879 1.176
        2.6882 2.883 1.174
        2.6954 2.885 1.175
        2.7027 2.888 1.176
        2.7100 2.894 1.176
        2.7174 2.894 1.173
        2.7248 2.895 1.176
        2.7322 2.898 1.175
        2.7397 2.900 1.176
        2.7473 2.906 1.176
        2.7548 2.905 1.175
        2.7624 2.909 1.180
        2.7701 2.913 1.176
        2.7778 2.913 1.176
        2.7855 2.917 1.179
        2.7933 2.921 1.179
        2.8011 2.923 1.177
        2.8090 2.922 1.178
        2.8169 2.924 1.183
        2.8249 2.930 1.185
        2.8329 2.933 1.194
        2.8409 2.936 1.185
        2.8490 2.941 1.184
        2.8571 2.943 1.183
        2.8653 2.945 1.185
        2.8736 2.947 1.185
        2.8918 2.952 1.187
        2.8902 2.955 1.187
        2.8986 2.961 1.186
        2.9070 2.960 1.182
        2.9155 2.960 1.185
        2.9240 2.965 1.186
        2.9326 2.967 1.186
        2.9412 2.971 1.187
        2.9499 2.971 1.185
        2.9586 2.973 1.180
        2.9674 2.979 1.189
        2.9762 2.982 1.190
        2.9851 2.986 1.189
        2.9940 2.988 1.190
        3.0030 2.993 1.188
        3.0120 2.992 1.187
        3.0211 2.993 1.190
        3.0303 2.998 1.193
        3.0395 3.003 1.191
        3.0488 3.004 1.190
        3.0581 3.007 1.190
        3.0675 3.007 1.191
        3.0769 3.013 1.195
        3.0864 3.016 1.192
        3.0960 3.018 1.193
        3.1056 3.021 1.193
        3.1153 3.024 1.191
        3.1250 3.025 1.193
        3.1348 3.029 1.194
        3.1447 3.033 1.195
        3.1546 3.037 1.194
        3.1646 3.039 1.191
        3.1746 3.037 1.192
        3.1847 3.040 1.196
        3.1949 3.044 1.197
        3.2051 3.046 1.197
        3.2154 3.050 1.199
        3.2258 3.055 1.198
        3.2362 3.060 1.198
        3.2468 3.062 1.194
        3.2573 3.063 1.195
        3.2680 3.065 1.196
        3.2787 3.066 1.195
        3.2895 3.067 1.199
        3.3003 3.075 1.199
        3.3113 3.074 1.200
        3.3223 3.080 1.203
        3.3333 3.085 1.199
        3.3445 3.084 1.198
        3.3557 3.090 1.202
        3.3670 3.093 1.198
        3.3784 3.094 1.201
        3.3898 3.097 1.201
        3.4014 3.101 1.201
        3.4130 3.101 1.201
        3.4247 3.107 1.205
        3.4364 3.113 1.199
        3.4483 3.112 1.197
        3.4602 3.114 1.200
        3.4722 3.117 1.200
        3.4843 3.118 1.201
        3.4965 3.123 1.202
        3.5088 3.125 1.202
        3.5211 3.127 1.201
        3.5336 3.129 1.201
        3.5461 3.132 1.202
        3.5587 3.135 1.201
        3.5714 3.137 1.200
        3.5842 3.137 1.202
        3.5971 3.139 1.206
        3.6101 3.148 1.208
        3.6232 3.152 1.203
        3.6364 3.151 1.203
        3.6496 3.153 1.204
        3.6630 3.153 1.205
        3.6765 3.159 1.209
        3.6900 3.161 1.206
        3.7037 3.163 1.210
        3.7175 3.168 1.210
        3.7313 3.171 1.210
        3.7453 3.173 1.207
        3.7594 3.175 1.212
        3.7736 3.180 1.213
        3.7879 3.182 1.213
        3.8023 3.188 1.215
        3.8168 3.193 1.211
        3.8314 3.193 1.209
        3.8462 3.194 1.211
        3.8610 3.196 1.213
        3.8760 3.200 1.219
        3.8911 3.207 1.215
        3.9063 3.208 1.212
        3.9216 3.211 1.212
        3.9370 3.213 1.212
        3.9526 3.216 1.216
        3.9683 3.219 1.215
        3.9841 3.220 1.214
        4.0000 3.221 1.215
        4.0161 3.226 1.219
        4.0323 3.232 1.219
        4.0486 3.233 1.219
        4.0650 3.238 1.220
        4.0816 3.239 1.219
        4.0984 3.245 1.221
        4.1152 3.247 1.218
        4.1322 3.249 1.221
        4.1494 3.253 1.220
        4.1667 3.255 1.219
        4.1841 3.256 1.219
        4.2373 3.269 1.223
        4.2017 3.260 1.224
        4.2194 3.268 1.225
        4.2553 3.273 1.226
        4.2735 3.279 1.222
        4.2918 3.280 1.223
        4.3103 3.285 1.222
        4.3290 3.285 1.221
        4.3478 3.287 1.224
        4.3668 3.292 1.223
        4.3860 3.293 1.220
        4.4053 3.295 1.224
        4.4248 3.299 1.223
        4.4444 3.300 1.225
        4.4643 3.306 1.227
        4.4843 3.308 1.224
        4.5045 3.308 1.225
        4.5249 3.314 1.228
        4.5455 3.317 1.227
        4.5662 3.318 1.229
        4.5872 3.324 1.231
        4.6083 3.330 1.229
        4.6296 3.330 1.228
        4.6512 3.333 1.230
        4.6729 3.337 1.229
        4.6948 3.338 1.231
        4.7170 3.344 1.232
        4.7393 3.345 1.230
        4.7619 3.346 1.233
        4.7847 3.351 1.236
        4.8077 3.357 1.236
        4.8309 3.360 1.236
        4.8544 3.366 1.235
        4.8780 3.369 1.235
        4.9020 3.373 1.234
        4.9261 3.375 1.231
        4.9505 3.377 1.232
        4.9751 3.382 1.234
        5.0000 3.388 1.231
        5.0251 3.386 1.226
        5.0505 3.386 1.227
        5.0761 3.387 1.228
        5.1020 3.388 1.232
        5.1282 3.393 1.234
        5.1546 3.395 1.234
        5.1813 3.397 1.234
        5.2083 3.401 1.236
        5.2356 3.404 1.237
        5.2632 3.409 1.238
        5.2910 3.410 1.236
        5.3191 3.411 1.239
        5.3476 3.415 1.240
        5.3763 3.420 1.240
        5.4054 3.419 1.239
        5.4348 3.422 1.243
        5.4645 3.426 1.244
        5.4945 3.430 1.244
        5.5249 3.432 1.245
        5.5556 3.435 1.246
        5.5866 3.440 1.247
        5.6180 3.441 1.247
        5.6497 3.443 1.250
        5.6818 3.447 1.251
        5.7143 3.452 1.253
        5.7471 3.456 1.254
        5.7803 3.459 1.252
        5.8140 3.459 1.253
        5.8480 3.463 1.255
        5.8824 3.466 1.259
        5.9172 3.471 1.256
        5.9524 3.471 1.258
        5.9880 3.476 1.260
        6.0241 3.479 1.257
        6.0606 3.479 1.261
        6.0976 3.483 1.261
        6.1350 3.487 1.263
        6.1728 3.488 1.263
        6.2112 3.491 1.267
        6.2500 3.496 1.270
        6.2893 3.500 1.269
        6.3291 3.503 1.270
        6.3694 3.506 1.268
        6.4103 3.505 1.270
        6.4516 3.507 1.273
        6.4935 3.512 1.278
        6.5359 3.520 1.276
        6.5789 3.518 1.277
        6.6225 3.524 1.279
        6.6667 3.524 1.279
        6.7114 3.528 1.282
        6.7568 3.530 1.280
        6.8027 3.532 1.282
        6.8493 3.532 1.284
        6.8966 3.536 1.290
        6.9444 3.541 1.289
        6.9930 3.543 1.290
        7.0423 3.544 1.291
        7.0922 3.548 1.293
        7.1429 3.549 1.294
        7.1942 3.550 1.298
        7.2464 3.552 1.301
        7.2993 3.558 1.304
        7.3529 3.559 1.303
        7.4074 3.563 1.305
        7.4627 3.563 1.307
        7.5188 3.567 1.307
        7.5758 3.565 1.309
        7.6336 3.567 1.312
        7.6923 3.568 1.315
        7.7519 3.569 1.319
        7.8125 3.572 1.324
        7.8740 3.574 1.324
        7.9365 3.574 1.327
        8.0000 3.574 1.331
        8.0645 3.577 1.338
        8.1301 3.582 1.338
        8.1967 3.580 1.340
        8.2645 3.579 1.346
        8.3333 3.583 1.352
        8.4034 3.585 1.354
        8.4746 3.585 1.356
        8.5470 3.582 1.363
        8.6207 3.583 1.370
        8.6957 3.587 1.374
        8.7719 3.590 1.378
        8.8496 3.587 1.381
        8.9286 3.588 1.392
        9.0090 3.590 1.397
        9.0909 3.594 1.403
        9.1743 3.592 1.405
        9.2593 3.589 1.415
        9.3458 3.592 1.424
        9.4340 3.593 1.431
        9.5238 3.592 1.442
        9.6154 3.601 1.451
        9.7087 3.603 1.453
        9.8039 3.603 1.460
        9.9010 3.601 1.464
        10.0000 3.601 1.479
        10.1010 3.606 1.485
        10.2041 3.606 1.493
        10.3093 3.607 1.502
        10.4167 3.609 1.510
        10.5263 3.609 1.518
        10.6383 3.612 1.525
        10.7527 3.609 1.532
        10.8696 3.606 1.542
        10.9890 3.604 1.554
        11.1111 3.605 1.563
        11.2360 3.599 1.573
        11.3636 3.598 1.586
        11.4943 3.595 1.595
        11.6279 3.587 1.609
        11.7647 3.582 1.627
        11.9048 3.577 1.641
        12.0482 3.571 1.660
        12.1951 3.569 1.677
        12.3457 3.561 1.693
        12.5000 3.554 1.715
        12.6582 3.546 1.735
        12.8205 3.533 1.760
        12.9870 3.522 1.787
        13.1579 3.509 1.821
        13.3333 3.499 1.859
        13.5135 3.491 1.903
        13.6986 3.489 1.947
        13.8889 3.491 1.991
        14.0845 3.493 2.033
        14.2857 3.492 2.077
        14.4928 3.492 2.129
        14.7059 3.497 2.176
        14.9254 3.494 2.228
        15.1515 3.492 2.284
        15.3846 3.484 2.348
        15.6250 3.468 2.427
        15.8730 3.470 2.530
        16.1290 3.474 2.626
        16.3934 3.454 2.761
        16.6667 3.455 2.963
        16.9492 3.514 3.249
        17.2414 3.755 3.642
        17.5439 4.372 3.907
        17.8571 5.091 3.604
        18.1818 5.314 2.966
        18.5185 5.131 2.540
        18.8679 4.902 2.383
        19.2308 4.731 2.348
        19.6078 4.613 2.365
        20.0000 4.524 2.402
        20.4082 4.456 2.460
        20.8333 4.413 2.535
        21.2766 4.391 2.614
        21.7391 4.380 2.694
        22.2222 4.373 2.776
        22.7273 4.371 2.867
        23.2558 4.372 2.959
        23.8095 4.362 3.078
        24.3902 4.361 3.224
        25.0000 4.365 3.413
        25.6410 4.409 3.655
        26.3158 4.484 3.958
        27.0270 4.668 4.392
        27.7778 5.167 4.940
        28.5714 6.308 5.210
        29.4118 7.376 4.290
        30.3030 7.272 3.268
        31.2500 6.871 2.855
        32.2581 6.567 2.776
        33.3333 6.418 2.807
        34.4828 6.342 2.858
        35.7143 6.329 2.950
        37.0370 6.381 3.017
        38.4615 6.416 3.058
        40.0000 6.485 3.185
        41.6667 6.677 3.226
        43.4783 6.738 3.253
        45.4545 6.933 3.357
        47.6190 7.124 3.331
        50.0000 7.341 3.400
        52.6316 7.679 3.351
        55.5556 7.943 3.209