# 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 of minerals and other materials from the millimeter to the ultraviolet, <a href="https://apps.dtic.mil/sti/citations/ADA192210"><i>Contractor Report</i> CRDEC-CR-88009 (1987)</a>
COMMENTS: |
    Extraordinary ray (e).
CONDITIONS:
    direction: e
DATA:
  - type: tabulated nk
    data: |
        2.5000 1.492 0.000
        2.5063 1.492 0.000
        2.5126 1.490 0.000
        2.5189 1.491 0.000
        2.5253 1.490 0.001
        2.5316 1.489 0.000
        2.5381 1.488 0.001
        2.5445 1.489 0.004
        2.5510 1.488 0.006
        2.5575 1.493 0.004
        2.5641 1.493 0.003
        2.5707 1.490 0.002
        2.5773 1.490 0.004
        2.5840 1.491 0.007
        2.5907 1.493 0.003
        2.5974 1.490 0.004
        2.6042 1.492 0.003
        2.6110 1.488 0.005
        2.6178 1.492 0.004
        2.6247 1.490 0.005
        2.6316 1.490 0.004
        2.6385 1.488 0.006
        2.6455 1.493 0.006
        2.6525 1.490 0.008
        2.6596 1.492 0.003
        2.6667 1.488 0.005
        2.6738 1.490 0.005
        2.6810 1.488 0.003
        2.6882 1.487 0.008
        2.6954 1.492 0.006
        2.7027 1.490 0.006
        2.7100 1.488 0.006
        2.7174 1.488 0.005
        2.7248 1.486 0.007
        2.7322 1.490 0.008
        2.7397 1.487 0.006
        2.7473 1.488 0.007
        2.7548 1.488 0.008
        2.7624 1.486 0.008
        2.7701 1.487 0.007
        2.7778 1.485 0.011
        2.7855 1.488 0.012
        2.7933 1.492 0.007
        2.8011 1.487 0.010
        2.8090 1.490 0.009
        2.8169 1.487 0.007
        2.8249 1.486 0.010
        2.8329 1.486 0.008
        2.8409 1.489 0.011
        2.8490 1.487 0.010
        2.8571 1.486 0.011
        2.8653 1.490 0.012
        2.8736 1.488 0.012
        2.8818 1.490 0.009
        2.8902 1.488 0.010
        2.8986 1.486 0.012
        2.9070 1.489 0.011
        2.9155 1.488 0.010
        2.9240 1.490 0.013
        2.9326 1.488 0.010
        2.9412 1.488 0.010
        2.9499 1.485 0.011
        2.9586 1.489 0.013
        2.9674 1.488 0.011
        2.9762 1.488 0.011
        2.9851 1.487 0.015
        2.9940 1.492 0.010
        3.0030 1.487 0.009
        3.0211 1.490 0.013
        3.0120 1.485 0.012
        3.0303 1.489 0.011
        3.0395 1.486 0.009
        3.0488 1.488 0.011
        3.0581 1.486 0.013
        3.0675 1.487 0.010
        3.0769 1.487 0.015
        3.0864 1.489 0.010
        3.0960 1.487 0.013
        3.1056 1.486 0.007
        3.1153 1.484 0.012
        3.1250 1.485 0.012
        3.1348 1.486 0.012
        3.1447 1.484 0.013
        3.1546 1.489 0.013
        3.1646 1.483 0.010
        3.1746 1.482 0.012
        3.1847 1.487 0.015
        3.1949 1.484 0.010
        3.2051 1.485 0.014
        3.2154 1.481 0.010
        3.2258 1.484 0.017
        3.2362 1.484 0.012
        3.2468 1.483 0.015
        3.2573 1.484 0.013
        3.2680 1.482 0.015
        3.2787 1.485 0.014
        3.2895 1.482 0.015
        3.3003 1.481 0.016
        3.3113 1.486 0.015
        3.3223 1.482 0.015
        3.3333 1.483 0.016
        3.3445 1.486 0.016
        3.3557 1.483 0.014
        3.3670 1.483 0.018
        3.3784 1.484 0.014
        3.3898 1.482 0.017
        3.4014 1.483 0.019
        3.4130 1.486 0.017
        3.4247 1.485 0.012
        3.4364 1.480 0.017
        3.4483 1.485 0.017
        3.4602 1.485 0.016
        3.4722 1.482 0.014
        3.4843 1.483 0.018
        3.4965 1.484 0.016
        3.5088 1.482 0.017
        3.5211 1.484 0.015
        3.5336 1.482 0.015
        3.5461 1.481 0.016
        3.5587 1.481 0.015
        3.5714 1.479 0.017
        3.5842 1.481 0.017
        3.5971 1.481 0.017
        3.6101 1.480 0.017
        3.6232 1.481 0.016
        3.6364 1.480 0.016
        3.6496 1.476 0.016
        3.6630 1.477 0.020
        3.6765 1.479 0.021
        3.6900 1.481 0.018
        3.7037 1.478 0.018
        3.7175 1.479 0.020
        3.7313 1.479 0.018
        3.7453 1.479 0.019
        3.7594 1.478 0.020
        3.7736 1.479 0.018
        3.7879 1.478 0.017
        3.8023 1.473 0.022
        3.8168 1.479 0.020
        3.8314 1.478 0.020
        3.8462 1.479 0.021
        3.8610 1.478 0.020
        3.8760 1.478 0.018
        3.8911 1.474 0.019
        3.9063 1.474 0.021
        3.9216 1.476 0.022
        3.9370 1.477 0.024
        3.9526 1.477 0.022
        3.9683 1.478 0.022
        3.9841 1.477 0.021
        4.0000 1.476 0.020
        4.0161 1.476 0.021
        4.0323 1.476 0.023
        4.0486 1.477 0.020
        4.0650 1.475 0.019
        4.0816 1.473 0.021
        4.0984 1.474 0.021
        4.1152 1.473 0.021
        4.1322 1.473 0.021
        4.1494 1.471 0.020
        4.1667 1.471 0.023
        4.1841 1.474 0.023
        4.2017 1.471 0.022
        4.2194 1.471 0.019
        4.2373 1.467 0.023
        4.2553 1.470 0.027
        4.2735 1.473 0.022
        4.2918 1.469 0.022
        4.3103 1.468 0.025
        4.3290 1.470 0.024
        4.3478 1.470 0.023
        4.3668 1.469 0.024
        4.3860 1.469 0.024
        4.4053 1.466 0.024
        4.4248 1.468 0.023
        4.4444 1.467 0.024
        4.4643 1.467 0.024
        4.4843 1.466 0.024
        4.5045 1.465 0.024
        4.5249 1.465 0.024
        4.5455 1.463 0.024
        4.5662 1.463 0.027
        4.5872 1.464 0.025
        4.6083 1.462 0.026
        4.6296 1.462 0.026
        4.6512 1.462 0.025
        4.6729 1.459 0.026
        4.6948 1.461 0.028
        4.7170 1.460 0.027
        4.7393 1.459 0.027
        4.7619 1.459 0.028
        4.7847 1.460 0.028
        4.8077 1.457 0.027
        4.8309 1.458 0.026
        4.8544 1.456 0.025
        4.8780 1.451 0.027
        4.9020 1.454 0.031
        4.9261 1.455 0.027
        4.9505 1.452 0.028
        4.9751 1.452 0.027
        5.0000 1.450 0.029
        5.0251 1.450 0.027
        5.0505 1.447 0.028
        5.0761 1.446 0.030
        5.1020 1.446 0.030
        5.1282 1.447 0.028
        5.1546 1.442 0.029
        5.1813 1.444 0.030
        5.2083 1.441 0.029
        5.2356 1.438 0.029
        5.2632 1.438 0.031
        5.2910 1.436 0.029
        5.3191 1.433 0.031
        5.3476 1.433 0.031
        5.3763 1.430 0.031
        5.4054 1.426 0.031
        5.4348 1.423 0.034
        5.4645 1.422 0.036
        5.4945 1.421 0.040
        5.5249 1.421 0.040
        5.5556 1.420 0.038
        5.5866 1.418 0.039
        5.6180 1.415 0.037
        5.6497 1.412 0.038
        5.6818 1.408 0.038
        5.7143 1.404 0.039
        5.7471 1.400 0.038
        5.7803 1.395 0.039
        5.8140 1.389 0.041
        5.8480 1.385 0.043
        5.8824 1.379 0.042
        5.9172 1.371 0.044
        5.9524 1.363 0.046
        5.9880 1.354 0.045
        6.0241 1.342 0.045
        6.0606 1.325 0.051
        6.0976 1.310 0.051
        6.1350 1.288 0.052
        6.1728 1.253 0.056
        6.2112 1.208 0.067
        6.2500 1.150 0.082
        6.2893 1.046 0.097
        6.3291 0.734 0.181
        6.3694 0.470 0.869
        6.4103 1.380 2.163
        6.4516 2.671 0.485
        6.4935 2.075 0.117
        6.5359 1.869 0.079
        6.5789 1.774 0.062
        6.6225 1.712 0.052
        6.6667 1.672 0.049
        6.7114 1.641 0.046
        6.7568 1.620 0.043
        6.8027 1.602 0.042
        6.8493 1.589 0.042
        6.8966 1.576 0.037
        6.9444 1.564 0.038
        6.9930 1.556 0.037
        7.0423 1.547 0.034
        7.0922 1.536 0.035
        7.1429 1.532 0.035
        7.1942 1.523 0.035
        7.2464 1.518 0.035
        7.2993 1.511 0.036
        7.3529 1.507 0.035
        7.4074 1.500 0.038
        7.4627 1.498 0.039
        7.5188 1.492 0.039
        7.5758 1.490 0.041
        7.6336 1.485 0.041
        7.6923 1.484 0.042
        7.7519 1.479 0.041
        7.8125 1.477 0.043
        7.8740 1.473 0.043
        7.9365 1.470 0.045
        8.0000 1.467 0.044
        8.0645 1.464 0.044
        8.1301 1.461 0.046
        8.1967 1.457 0.044
        8.2645 1.454 0.047
        8.3333 1.450 0.047
        8.4034 1.449 0.046
        8.4746 1.444 0.047
        8.5470 1.440 0.047
        8.6207 1.437 0.049
        8.6957 1.434 0.048
        8.7719 1.429 0.049
        8.8496 1.423 0.050
        8.9286 1.419 0.052
        9.0090 1.416 0.053
        9.0909 1.414 0.057
        9.1743 1.410 0.051
        9.2593 1.403 0.052
        9.3458 1.397 0.053
        9.4340 1.389 0.053
        9.5238 1.385 0.054
        9.6154 1.376 0.052
        9.7087 1.366 0.054
        9.8039 1.359 0.055
        9.9010 1.346 0.053
        10.0000 1.333 0.055
        10.1010 1.318 0.055
        10.2041 1.300 0.055
        10.3093 1.281 0.058
        10.4167 1.255 0.059
        10.5263 1.224 0.061
        10.6383 1.182 0.063
        10.7527 1.122 0.065
        10.8696 1.030 0.072
        10.9890 0.902 0.010
        11.1111 0.296 0.296
        11.2360 0.097 1.226
        11.3636 0.829 3.271
        11.4943 3.410 0.004
        11.6279 2.162 0.017
        11.7647 1.949 0.057
        11.9048 1.806 0.026
        12.0482 1.722 0.035
        12.1951 1.663 0.037
        12.3457 1.622 0.041
        12.5000 1.590 0.042
        12.6582 1.562 0.044
        12.8205 1.539 0.047
        12.9870 1.518 0.047
        13.1579 1.499 0.051
        13.3333 1.481 0.053
        13.5135 1.456 0.061
        13.6986 1.466 0.090
        13.8889 1.468 0.060
        14.0845 1.443 0.057
        14.2857 1.428 0.059
        14.4928 1.415 0.063
        14.7059 1.402 0.065
        14.9254 1.391 0.061
        15.1515 1.376 0.064
        15.3846 1.359 0.067
        15.6250 1.340 0.074
        15.8730 1.343 0.076
        16.1290 1.326 0.074
        16.3934 1.311 0.070
        16.6667 1.295 0.067
        16.9492 1.271 0.067
        17.2414 1.245 0.070
        17.5439 1.226 0.075
        17.8571 1.200 0.077
        18.1818 1.178 0.083
        18.5185 1.144 0.085
        18.8679 1.116 0.091
        19.2308 1.074 0.096
        19.6078 1.040 0.117
        20.0000 1.004 0.118
        20.4082 0.953 0.124
        20.8333 0.892 0.128
        21.2766 0.808 0.147
        21.7391 0.711 0.169
        22.2222 0.576 0.222
        22.7273 0.425 0.336
        23.2558 0.296 0.521
        23.8095 0.222 0.751
        24.3902 0.195 0.998
        25.0000 0.198 1.266
        25.6410 0.239 1.594
        26.3158 0.387 2.028
        27.0270 0.839 2.548
        27.7778 1.930 2.702
        28.5714 2.495 1.644
        29.4118 2.005 1.142
        30.3030 1.656 1.275
        31.2500 1.734 1.763
        32.2581 2.656 1.756
        33.3333 2.682 0.827
        34.4828 2.340 0.595
        35.7143 2.111 0.506
        37.0370 1.970 0.544
        38.4615 1.968 0.501
        40.0000 1.852 0.380
        41.6667 1.708 0.347
        43.4783 1.613 0.315
        45.4545 1.444 0.232
        47.6190 1.252 0.165
        50.0000 0.789 0.026