# 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: |
    Ordinary ray (o).
CONDITIONS:
    direction: o
DATA:
  - type: tabulated nk
    data: |
        3.1546 1.558 0.013
        2.5000 1.578 0.000
        2.5063 1.579 0.000
        2.5126 1.576 0.000
        2.5189 1.578 0.000
        2.5253 1.576 0.000
        2.5316 1.578 0.000
        2.5381 1.575 0.000
        2.5445 1.576 0.001
        2.5510 1.575 0.003
        2.5575 1.576 0.003
        2.5641 1.579 0.002
        2.5707 1.576 0.002
        2.5773 1.578 0.002
        2.5840 1.576 0.005
        2.5907 1.578 0.001
        2.5974 1.575 0.002
        2.6042 1.578 0.004
        2.6110 1.573 0.002
        2.6178 1.577 0.002
        2.6247 1.574 0.005
        2.6316 1.576 0.005
        2.6385 1.573 0.003
        2.6455 1.576 0.006
        2.6525 1.574 0.005
        2.6596 1.573 0.004
        2.6667 1.572 0.008
        2.6738 1.575 0.005
        2.6810 1.572 0.006
        2.6882 1.574 0.007
        2.6954 1.574 0.007
        2.7027 1.574 0.006
        2.7100 1.570 0.004
        2.7174 1.571 0.006
        2.7248 1.569 0.008
        2.7322 1.571 0.009
        2.7397 1.571 0.006
        2.7473 1.567 0.007
        2.7548 1.569 0.010
        2.7624 1.570 0.010
        2.7701 1.570 0.008
        2.7778 1.568 0.011
        2.7855 1.569 0.010
        2.7933 1.569 0.012
        2.8011 1.568 0.010
        2.8090 1.570 0.011
        2.8169 1.570 0.012
        2.8249 1.570 0.010
        2.8329 1.568 0.009
        2.8409 1.568 0.012
        2.8490 1.567 0.011
        2.8571 1.568 0.013
        2.8653 1.569 0.012
        2.8736 1.568 0.012
        2.8818 1.567 0.012
        2.8902 1.569 0.011
        2.8986 1.566 0.012
        2.9070 1.566 0.010
        2.9155 1.565 0.012
        2.9240 1.568 0.014
        2.9326 1.566 0.011
        2.9412 1.566 0.011
        2.9499 1.561 0.013
        2.9586 1.566 0.014
        2.9674 1.566 0.013
        2.9762 1.564 0.012
        2.9851 1.564 0.012
        2.9940 1.563 0.012
        3.0030 1.563 0.012
        3.0120 1.561 0.014
        3.0211 1.564 0.015
        3.0303 1.563 0.013
        3.0395 1.562 0.013
        3.0488 1.564 0.012
        3.0581 1.561 0.012
        3.0675 1.561 0.013
        3.0769 1.559 0.013
        3.0864 1.560 0.014
        3.0960 1.560 0.016
        3.1056 1.562 0.011
        3.1153 1.559 0.013
        3.1250 1.558 0.011
        3.1348 1.556 0.014
        3.1447 1.556 0.015
        3.1646 1.553 0.012
        3.1746 1.554 0.013
        3.1847 1.555 0.017
        3.1949 1.554 0.012
        3.2051 1.553 0.016
        3.2154 1.553 0.013
        3.2258 1.553 0.017
        3.2362 1.553 0.013
        3.2468 1.551 0.014
        3.2573 1.548 0.015
        3.2680 1.549 0.016
        3.2787 1.549 0.016
        3.2895 1.546 0.018
        3.3003 1.544 0.019
        3.3113 1.548 0.022
        3.3223 1.547 0.023
        3.3333 1.551 0.021
        3.3445 1.552 0.019
        3.3557 1.546 0.019
        3.3670 1.548 0.023
        3.3784 1.548 0.018
        3.3898 1.547 0.020
        3.4014 1.546 0.022
        3.4130 1.547 0.020
        3.4247 1.545 0.021
        3.4364 1.542 0.022
        3.4483 1.546 0.025
        3.4602 1.549 0.025
        3.4722 1.546 0.023
        3.4843 1.551 0.024
        3.4965 1.550 0.020
        3.5088 1.550 0.019
        3.5211 1.547 0.015
        3.5336 1.544 0.018
        3.5461 1.547 0.016
        3.5587 1.542 0.014
        3.5714 1.540 0.014
        3.5842 1.538 0.018
        3.5971 1.539 0.017
        3.6102 1.537 0.018
        3.6232 1.537 0.015
        3.6364 1.536 0.018
        3.6496 1.533 0.016
        3.6630 1.533 0.019
        3.6765 1.534 0.021
        3.6900 1.535 0.017
        3.7037 1.532 0.016
        3.7175 1.528 0.016
        3.7313 1.529 0.017
        3.7453 1.524 0.019
        3.7594 1.524 0.019
        3.7736 1.524 0.021
        3.7879 1.523 0.021
        3.8023 1.520 0.026
        3.8168 1.525 0.023
        3.8314 1.524 0.021
        3.8462 1.519 0.022
        3.8610 1.516 0.024
        3.8760 1.517 0.028
        3.8911 1.515 0.025
        3.9063 1.512 0.033
        3.9216 1.515 0.035
        3.9370 1.519 0.041
        3.9526 1.523 0.041
        3.9683 1.532 0.040
        3.9841 1.534 0.029
        4.0000 1.530 0.025
        4.0161 1.529 0.022
        4.0323 1.523 0.021
        4.0486 1.523 0.021
        4.0650 1.522 0.019
        4.0816 1.517 0.018
        4.0984 1.516 0.019
        4.1152 1.515 0.017
        4.1322 1.511 0.018
        4.1494 1.509 0.019
        4.1667 1.510 0.019
        4.1841 1.507 0.019
        4.2017 1.507 0.018
        4.2194 1.501 0.018
        4.2373 1.502 0.018
        4.2553 1.498 0.020
        4.2735 1.500 0.020
        4.2918 1.496 0.019
        4.3103 1.495 0.021
        4.3290 1.495 0.021
        4.3478 1.493 0.017
        4.3668 1.490 0.018
        4.3860 1.487 0.019
        4.4053 1.484 0.019
        4.4248 1.484 0.019
        4.4444 1.482 0.020
        4.4643 1.480 0.019
        4.4843 1.478 0.020
        4.5045 1.475 0.018
        4.5249 1.473 0.020
        4.5455 1.471 0.019
        4.5662 1.468 0.020
        4.5872 1.466 0.020
        4.6083 1.463 0.021
        4.6296 1.463 0.021
        4.6512 1.458 0.019
        4.6729 1.456 0.021
        4.6948 1.454 0.020
        4.7170 1.452 0.020
        4.7393 1.447 0.019
        4.7619 1.445 0.021
        4.7847 1.442 0.018
        4.8077 1.437 0.021
        4.8309 1.436 0.020
        4.8544 1.432 0.018
        4.8780 1.426 0.020
        4.9020 1.424 0.022
        4.9261 1.421 0.019
        4.9505 1.416 0.020
        4.9751 1.412 0.020
        5.0000 1.409 0.021
        5.0251 1.403 0.019
        5.0505 1.397 0.019
        5.0761 1.391 0.022
        5.1020 1.389 0.022
        5.1282 1.384 0.020
        5.1546 1.375 0.022
        5.1813 1.372 0.022
        5.2083 1.365 0.022
        5.2356 1.359 0.019
        5.2632 1.351 0.023
        5.2910 1.344 0.022
        5.3191 1.336 0.024
        5.3476 1.328 0.022
        5.3763 1.318 0.021
        5.4054 1.306 0.025
        5.4348 1.291 0.027
        5.4645 1.275 0.042
        5.4945 1.279 0.059
        5.5249 1.290 0.057
        5.5556 1.286 0.044
        5.5866 1.273 0.040
        5.6180 1.262 0.034
        5.6497 1.245 0.033
        5.6818 1.231 0.030
        5.7143 1.213 0.032
        5.7471 1.196 0.031
        5.7803 1.177 0.032
        5.8140 1.156 0.032
        5.8480 1.140 0.038
        5.8824 1.117 0.034
        5.9172 1.090 0.033
        5.9524 1.061 0.038
        5.9880 1.024 0.038
        6.0241 0.998 0.050
        6.0606 0.960 0.050
        6.0976 0.921 0.051
        6.1350 0.867 0.054
        6.1728 0.807 0.060
        6.2112 0.738 0.072
        6.2500 0.660 0.083
        6.2893 0.554 0.089
        6.3291 0.373 0.105
        6.3694 0.144 0.296
        6.4103 0.086 0.551
        6.4516 0.077 0.750
        6.4935 0.080 0.931
        6.5359 0.089 1.107
        6.5789 0.102 1.286
        6.6225 0.120 1.478
        6.6667 0.147 1.689
        6.7114 0.187 1.925
        6.7568 0.241 2.202
        6.8027 0.326 2.546
        6.8493 0.490 2.979
        6.8966 0.774 3.492
        6.9444 1.181 4.250
        6.9930 2.657 5.709
        7.0423 6.584 3.793
        7.0922 5.350 1.022
        7.1429 4.431 0.351
        7.1942 3.771 0.150
        7.2464 3.392 0.095
        7.2993 3.141 0.054
        7.3529 2.942 0.029
        7.4074 2.790 0.024
        7.4627 2.676 0.024
        7.5188 2.583 0.017
        7.5758 2.503 0.017
        7.6336 2.437 0.018
        7.6923 2.382 0.017
        7.7519 2.333 0.015
        7.8125 2.290 0.014
        7.8740 2.249 0.012
        7.9365 2.214 0.017
        8.0000 2.185 0.015
        8.0645 2.156 0.016
        8.1301 2.134 0.018
        8.1967 2.112 0.015
        8.2645 2.091 0.013
        8.3333 2.068 0.016
        8.4034 2.054 0.016
        8.4746 2.038 0.014
        8.5470 2.021 0.010
        8.6207 2.005 0.012
        8.6957 1.991 0.011
        8.7719 1.978 0.011
        8.8496 1.964 0.011
        8.9286 1.952 0.011
        9.0090 1.943 0.012
        9.0909 1.932 0.010
        9.1743 1.921 0.010
        9.2593 1.913 0.009
        9.3458 1.902 0.008
        9.4340 1.892 0.007
        9.5238 1.884 0.008
        9.6154 1.874 0.006
        9.7087 1.865 0.008
        9.8039 1.859 0.007
        9.9010 1.849 0.005
        10.0000 1.842 0.004
        10.1010 1.832 0.005
        10.2041 1.825 0.006
        10.3093 1.817 0.004
        10.4167 1.809 0.005
        10.5263 1.801 0.005
        10.6383 1.795 0.007
        10.7527 1.789 0.005
        10.8696 1.778 0.005
        10.9890 1.772 0.005
        11.1111 1.762 0.007
        11.2360 1.758 0.008
        11.3636 1.754 0.009
        11.4943 1.747 0.004
        11.6279 1.735 0.004
        11.7647 1.726 0.004
        11.9048 1.718 0.004
        12.0482 1.710 0.005
        12.1951 1.696 0.004
        12.3457 1.689 0.008
        12.5000 1.678 0.009
        12.6582 1.668 0.010
        12.8205 1.653 0.011
        12.9870 1.634 0.011
        13.1579 1.611 0.017
        13.3333 1.570 0.026
        13.5135 1.452 0.100
        13.6986 1.686 0.426
        13.8889 1.847 0.029
        14.0845 1.719 0.008
        14.2857 1.679 0.008
        14.4928 1.652 0.012
        14.7059 1.634 0.011
        14.9254 1.612 0.012
        15.1515 1.599 0.016
        15.3846 1.582 0.019
        15.6250 1.570 0.019
        15.8730 1.557 0.016
        16.1290 1.534 0.018
        16.3934 1.514 0.021
        16.6667 1.499 0.018
        16.9492 1.472 0.023
        17.2414 1.449 0.024
        17.5439 1.422 0.028
        17.8571 1.392 0.033
        18.1818 1.361 0.042
        18.5185 1.325 0.049
        18.8679 1.292 0.059
        19.2308 1.249 0.069
        19.6078 1.203 0.086
        20.0000 1.160 0.102
        20.4082 1.105 0.107
        20.8333 1.023 0.111
        21.2766 0.913 0.141
        21.7391 0.780 0.182
        22.2222 0.604 0.282
        22.7273 0.431 0.474
        23.2558 0.319 0.736
        23.8095 0.269 1.023
        24.3902 0.264 1.331
        25.0000 0.291 1.668
        25.6410 0.367 2.069
        26.3158 0.539 2.559
        27.0270 0.879 3.157
        27.7778 1.597 3.997
        28.5714 3.856 4.448
        29.4118 5.102 1.998
        30.3030 4.294 0.621
        31.2500 3.552 0.270
        32.2581 3.102 0.168
        33.3333 2.739 0.149
        34.4828 2.424 0.212
        35.7143 2.021 0.451
        37.0370 1.869 1.262
        38.4615 3.382 2.324
        40.0000 3.906 0.000