# 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>
DATA:
  - type: tabulated nk
    data: |
        2.5000 1.471 0.000
        2.5063 1.469 0.000
        2.5126 1.466 0.000
        2.5189 1.465 0.000
        2.5253 1.466 0.000
        2.5316 1.467 0.000
        2.5381 1.468 0.000
        2.5445 1.468 0.000
        2.5510 1.468 0.000
        2.5575 1.469 0.000
        2.5641 1.469 0.000
        2.5707 1.470 0.000
        2.5773 1.470 0.000
        2.5640 1.469 0.000
        2.5907 1.468 0.000
        2.5974 1.465 0.000
        2.6042 1.465 0.000
        2.6110 1.466 0.000
        2.6178 1.468 0.000
        2.6247 1.469 0.000
        2.6316 1.467 0.000
        2.6385 1.466 0.000
        2.6455 1.466 0.000
        2.6525 1.469 0.000
        2.6596 1.469 0.000
        2.6667 1.467 0.000
        2.6738 1.468 0.000
        2.6810 1.469 0.000
        2.6882 1.469 0.000
        2.6954 1.468 0.000
        2.7027 1.468 0.000
        2.7100 1.468 0.000
        2.7174 1.466 0.000
        2.7248 1.468 0.000
        2.7322 1.467 0.000
        2.7397 1.467 0.000
        2.7473 1.466 0.000
        2.7548 1.468 0.001
        2.7624 1.469 0.000
        2.7701 1.469 0.000
        2.7778 1.469 0.000
        2.7855 1.468 0.000
        2.7933 1.468 0.000
        2.8011 1.467 0.000
        2.8090 1.467 0.000
        2.8169 1.467 0.000
        2.8249 1.466 0.000
        2.8329 1.464 0.000
        2.8409 1.465 0.000
        2.8490 1.466 0.000
        2.8571 1.466 0.000
        2.8653 1.466 0.000
        2.8736 1.466 0.000
        2.8818 1.466 0.000
        2.8902 1.465 0.000
        2.8986 1.465 0.000
        2.9070 1.466 0.000
        2.9155 1.464 0.000
        2.9240 1.465 0.000
        2.9326 1.465 0.000
        2.9412 1.466 0.000
        2.9499 1.466 0.000
        2.9586 1.465 0.000
        2.9674 1.464 0.000
        2.9762 1.466 0.000
        2.9851 1.465 0.000
        2.9940 1.465 0.000
        3.0030 1.464 0.000
        3.0120 1.463 0.000
        3.0211 1.463 0.000
        3.0303 1.463 0.000
        3.0395 1.464 0.000
        3.0488 1.464 0.000
        3.0581 1.463 0.000
        3.0675 1.463 0.000
        3.0769 1.464 0.000
        3.0864 1.463 0.000
        3.0960 1.461 0.000
        3.1056 1.460 0.000
        3.1153 1.461 0.001
        3.1250 1.462 0.000
        3.1348 1.463 0.000
        3.1447 1.463 0.000
        3.1646 1.462 0.000
        3.1746 1.462 0.000
        3.1847 1.459 0.000
        3.1949 1.459 0.000
        3.2051 1.460 0.000
        3.2154 1.458 0.000
        3.2258 1.456 0.000
        3.2362 1.456 0.001
        3.2468 1.458 0.003
        3.2573 1.456 0.002
        3.2680 1.459 0.002
        3.2787 1.460 0.001
        3.2895 1.451 0.000
        3.3003 1.454 0.001
        3.3113 1.450 0.002
        3.3223 1.448 0.006
        3.3333 1.445 0.015
        3.3445 1.449 0.024
        3.3557 1.461 0.030
        3.3670 1.474 0.018
        3.3784 1.469 0.013
        3.3898 1.473 0.010
        3.4014 1.471 0.009
        3.4130 1.473 0.012
        3.4247 1.469 0.007
        3.4364 1.460 0.003
        3.4483 1.475 0.010
        3.4602 1.473 0.005
        3.4722 1.466 0.003
        3.4843 1.468 0.005
        3.4965 1.473 0.003
        3.5086 1.470 0.000
        3.5221 1.467 0.000
        3.5336 1.467 0.001
        3.5462 1.468 0.000
        3.5587 1.467 0.000
        3.5714 1.464 0.000
        3.5842 1.461 0.000
        3.5976 1.462 0.001
        3.6101 1.464 0.001
        3.6232 1.464 0.000
        3.6364 1.464 0.000
        3.6496 1.465 0.000
        3.6630 1.465 0.000
        3.6765 1.463 0.000
        3.7037 1.462 0.000
        3.6900 1.462 0.000
        3.7175 1.462 0.000
        3.7313 1.462 0.000
        3.7453 1.462 0.000
        3.7594 1.460 0.000
        3.7736 1.458 0.000
        3.7879 1.456 0.001
        3.8023 1.460 0.001
        3.8168 1.461 0.000
        3.8314 1.460 0.000
        3.8462 1.460 0.000
        3.8610 1.459 0.000
        3.8760 1.459 0.000
        3.8911 1.460 0.000
        3.9063 1.458 0.000
        3.9216 1.458 0.000
        3.9370 1.458 0.000
        3.9526 1.459 0.000
        3.9683 1.458 0.000
        3.9841 1.457 0.000
        4.0000 1.458 0.000
        4.0161 1.456 0.000
        4.0323 1.456 0.000
        4.0486 1.456 0.000
        4.0650 1.457 0.000
        4.0816 1.456 0.000
        4.0984 1.455 0.000
        4.1152 1.454 0.000
        4.1322 1.456 0.000
        4.1494 1.456 0.000
        4.1667 1.455 0.000
        4.1841 1.453 0.000
        4.2017 1.453 0.000
        4.2194 1.452 0.000
        4.2373 1.452 0.002
        4.2553 1.453 0.001
        4.2735 1.453 0.002
        4.2918 1.454 0.001
        4.3103 1.452 0.001
        4.3290 1.453 0.000
        4.3478 1.452 0.000
        4.3668 1.452 0.001
        4.3860 1.453 0.001
        4.4053 1.453 0.000
        4.4248 1.452 0.000
        4.4444 1.450 0.000
        4.4643 1.450 0.001
        4.4643 1.450 0.001
        4.5045 1.450 0.000
        4.5249 1.449 0.000
        4.5455 1.448 0.000
        4.5662 1.448 0.001
        4.5872 1.448 0.000
        4.6083 1.448 0.000
        4.6296 1.446 0.000
        4.6512 1.446 0.001
        4.6729 1.446 0.001
        4.6948 1.445 0.001
        4.7170 1.444 0.002
        4.7393 1.444 0.002
        4.7619 1.444 0.002
        4.7847 1.444 0.001
        4.8077 1.444 0.000
        4.8309 1.441 0.000
        4.8544 1.440 0.002
        4.8780 1.440 0.003
        4.9020 1.440 0.003
        4.9261 1.438 0.003
        4.9505 1.438 0.003
        4.9751 1.436 0.004
        5.0000 1.436 0.006
        5.0251 1.437 0.007
        5.0505 1.439 0.006
        5.0761 1.438 0.004
        5.1020 1.436 0.003
        5.1282 1.435 0.003
        5.1546 1.433 0.003
        5.1813 1.432 0.003
        5.2083 1.430 0.002
        5.2356 1.428 0.003
        5.2632 1.427 0.003
        5.2910 1.425 0.002
        5.3191 1.421 0.003
        5.3476 1.421 0.004
        5.3763 1.416 0.003
        5.4054 1.413 0.006
        5.4348 1.412 0.003
        5.4645 1.406 0.002
        5.4945 1.402 0.004
        5.5249 1.394 0.005
        5.5556 1.387 0.002
        5.5866 1.372 0.006
        5.6180 1.357 0.009
        5.6497 1.336 0.017
        5.6818 1.303 0.028
        5.7143 1.221 0.074
        5.7471 1.185 0.260
        5.7803 1.393 0.434
        5.8140 1.663 0.346
        5.8480 1.687 0.106
        5.8824 1.600 0.035
        5.9172 1.556 0.024
        5.9524 1.533 0.015
        5.9880 1.518 0.009
        6.0241 1.503 0.005
        6.0606 1.493 0.006
        6.0976 1.482 0.003
        6.1350 1.477 0.004
        6.1728 1.465 0.004
        6.2112 1.457 0.006
        6.2500 1.461 0.028
        6.2893 1.468 0.008
        6.3291 1.464 0.026
        6.3694 1.467 0.006
        6.4103 1.458 0.005
        6.4516 1.454 0.001
        6.4935 1.447 0.004
        6.5359 1.443 0.005
        6.5789 1.436 0.002
        6.6225 1.432 0.006
        6.6667 1.420 0.005
        6.7114 1.411 0.023
        6.7568 1.414 0.026
        6.8027 1.422 0.034
        6.8493 1.425 0.027
        6.8966 1.418 0.046
        6.9444 1.450 0.027
        6.9930 1.432 0.009
        7.0423 1.413 0.008
        7.0922 1.402 0.009
        7.1429 1.389 0.020
        7.1942 1.392 0.038
        7.2464 1.380 0.023
        7.2993 1.343 0.089
        7.3529 1.434 0.034
        7.4074 1.383 0.010
        7.4627 1.346 0.015
        7.5188 1.307 0.017
        7.5758 1.249 0.042
        7.6336 1.150 0.106
        7.6923 1.119 0.327
        7.7519 1.300 0.520
        7.8125 1.549 0.503
        7.8740 1.699 0.345
        7.9365 1.695 0.235
        8.0000 1.698 0.139
        8.0645 1.675 0.074
        8.1301 1.613 0.028
        8.1967 1.577 0.018
        8.2645 1.544 0.013
        8.3333 1.517 0.015
        8.4034 1.492 0.018
        8.4746 1.455 0.034
        8.5470 1.476 0.059
        8.6207 1.452 0.040
        8.6957 1.387 0.067
        8.7719 1.388 0.185
        8.8496 1.476 0.231
        8.9280 1.581 0.228
        9.0090 1.634 0.130
        9.0909 1.579 0.062
        9.1743 1.535 0.053
        9.2593 1.443 0.129
        9.3458 1.662 0.219
        9.4340 1.646 0.036
        9.5238 1.565 0.021
        9.6154 1.579 0.103
        9.7087 1.570 0.024
        9.8039 1.554 0.070
        9.9010 1.600 0.057
        10.0000 1.596 0.019
        10.1010 1.577 0.004
        10.2041 1.562 0.002
        10.3093 1.549 0.002
        10.4167 1.549 0.005
        10.5263 1.544 0.000
        10.6383 1.532 0.000
        10.7527 1.526 0.000
        10.8696 1.523 0.000
        10.9890 1.518 0.000
        11.1111 1.511 0.001
        11.2360 1.508 0.006
        11.3636 1.498 0.005
        11.4943 1.493 0.028
        11.6279 1.514 0.031
        11.7647 1.516 0.019
        11.9048 1.519 0.007
        12.0482 1.505 0.001
        12.1951 1.494 0.003
        12.3457 1.479 0.003
        12.5000 1.468 0.020
        12.6582 1.468 0.038
        12.8205 1.478 0.045
        12.9670 1.474 0.043
        13.1579 1.446 0.059
        13.3333 1.444 0.157
        13.5135 1.617 0.155
        13.6986 1.599 0.033
        13.8889 1.558 0.017
        14.0845 1.526 0.041
        14.2857 1.567 0.042
        14.4928 1.572 0.023
        14.7059 1.553 0.001
        14.9254 1.538 0.000
        15.1515 1.528 0.002
        15.3846 1.536 0.023
        15.6250 1.535 0.003
        15.8730 1.534 0.003
        16.1290 1.527 0.001
        16.3934 1.525 0.000
        16.6667 1.526 0.000
        16.9492 1.515 0.000
        17.2414 1.512 0.000
        17.5439 1.503 0.007
        17.8571 1.521 0.024
        18.1818 1.524 0.005
        18.5185 1.517 0.003
        18.8679 1.516 0.003
        19.2308 1.518 0.003
        19.6078 1.513 0.000
        20.0000 1.512 0.000
        20.4082 1.511 0.000
        20.8333 1.506 0.000
        21.2766 1.507 0.002
        21.7391 1.501 0.002
        22.2222 1.500 0.004
        22.7273 1.500 0.003
        23.2558 1.493 0.003
        23.8095 1.487 0.011
        24.3902 1.490 0.024
        25.0000 1.501 0.023
        25.6410 1.507 0.021
        26.3158 1.502 0.016
        27.0270 1.495 0.023
        27.7778 1.498 0.035
        28.5714 1.510 0.043
        29.4118 1.524 0.040
        30.3030 1.532 0.032
        31.2500 1.534 0.023
        32.2581 1.534 0.017
        33.3333 1.534 0.012
        34.4828 1.532 0.008
        35.7143 1.531 0.005
        37.0370 1.529 0.003
        38.4615 1.529 0.000
        40.0000 1.528 0.000
        41.6667 1.524 0.000
        43.4783 1.525 0.000
        45.4545 1.527 0.000
        47.6190 1.524 0.000
        50.0000 1.520 0.000
        52.6316 1.510 0.000
        55.5556 1.501 0.000