# 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: |
    n<sub>β</sub>, k<sub>β</sub>.
CONDITIONS:
    direction: beta
DATA:
  - type: tabulated nk
    data: |
        2.5000 1.553 0.000
        2.5063 1.553 0.001
        2.5126 1.553 0.002
        2.5189 1.553 0.002
        2.5253 1.553 0.003
        2.5316 1.553 0.003
        2.5381 1.554 0.004
        2.5445 1.554 0.004
        2.5510 1.554 0.004
        2.5575 1.554 0.004
        2.5641 1.554 0.004
        2.5707 1.554 0.004
        2.5773 1.554 0.004
        2.5840 1.554 0.004
        2.5907 1.554 0.004
        2.5974 1.554 0.004
        2.6042 1.554 0.004
        2.6110 1.554 0.003
        2.6178 1.554 0.002
        2.6247 1.553 0.002
        2.6316 1.553 0.002
        2.6385 1.552 0.001
        2.6455 1.551 0.001
        2.6525 1.551 0.000
        2.6596 1.550 0.000
        2.6667 1.550 0.000
        2.6738 1.549 0.000
        2.6810 1.548 0.000
        2.6882 1.547 0.000
        2.6954 1.546 0.000
        2.7027 1.545 0.000
        2.7100 1.543 0.000
        2.7174 1.542 0.000
        2.7248 1.541 0.000
        2.7322 1.540 0.000
        2.7397 1.539 0.000
        2.7473 1.538 0.000
        2.7548 1.537 0.000
        2.7624 1.535 0.001
        2.7701 1.534 0.001
        2.7778 1.534 0.002
        2.7855 1.532 0.003
        2.7933 1.532 0.003
        2.8011 1.531 0.004
        2.8090 1.530 0.005
        2.8169 1.530 0.006
        2.8249 1.529 0.007
        2.8329 1.529 0.008
        2.8409 1.528 0.008
        2.8490 1.528 0.009
        2.8571 1.528 0.010
        2.8653 1.527 0.010
        2.8736 1.527 0.010
        2.8818 1.527 0.011
        2.8902 1.526 0.011
        2.8986 1.526 0.011
        2.9070 1.525 0.011
        2.9155 1.525 0.012
        2.9240 1.524 0.012
        2.9326 1.523 0.013
        2.9412 1.522 0.013
        2.9499 1.522 0.014
        2.9586 1.521 0.014
        2.9674 1.520 0.015
        2.9762 1.519 0.016
        2.9851 1.519 0.017
        2.9940 1.518 0.018
        3.0030 1.518 0.019
        3.0120 1.517 0.020
        3.0211 1.517 0.021
        3.0303 1.516 0.022
        3.0395 1.516 0.023
        3.0488 1.516 0.024
        3.0581 1.516 0.025
        3.0675 1.516 0.025
        3.0769 1.515 0.026
        3.0864 1.515 0.027
        3.0960 1.514 0.028
        3.1056 1.514 0.028
        3.1153 1.514 0.029
        3.1250 1.513 0.030
        3.1348 1.513 0.032
        3.1447 1.513 0.033
        3.1546 1.512 0.035
        3.1646 1.513 0.036
        3.1746 1.513 0.038
        3.1847 1.513 0.039
        3.1949 1.513 0.040
        3.2051 1.514 0.042
        3.2154 1.514 0.043
        3.2258 1.515 0.044
        3.2362 1.516 0.046
        3.2468 1.517 0.047
        3.2573 1.518 0.048
        3.2680 1.519 0.049
        3.2787 1.521 0.049
        3.2895 1.522 0.050
        3.3003 1.524 0.050
        3.3113 1.525 0.050
        3.3223 1.527 0.050
        3.3333 1.528 0.050
        3.3445 1.528 0.050
        3.3557 1.530 0.050
        3.3670 1.530 0.049
        3.3784 1.531 0.049
        3.3898 1.532 0.048
        3.4014 1.532 0.048
        3.4130 1.533 0.047
        3.4247 1.533 0.047
        3.4364 1.534 0.047
        3.4483 1.534 0.047
        3.4602 1.535 0.047
        3.4722 1.536 0.047
        3.4843 1.536 0.047
        3.4965 1.537 0.046
        3.5088 1.539 0.046
        3.5211 1.540 0.045
        3.5336 1.541 0.045
        3.5461 1.542 0.044
        3.5587 1.543 0.042
        3.5714 1.544 0.041
        3.5842 1.545 0.040
        3.5971 1.547 0.038
        3.6101 1.548 0.036
        3.6232 1.549 0.033
        3.6364 1.549 0.030
        3.6496 1.549 0.027
        3.6630 1.548 0.024
        3.6765 1.546 0.021
        3.6900 1.544 0.018
        3.7037 1.542 0.016
        3.7175 1.540 0.015
        3.7313 1.537 0.013
        3.7453 1.536 0.012
        3.7594 1.533 0.010
        3.7736 1.531 0.009
        3.7879 1.528 0.008
        3.8023 1.526 0.008
        3.8168 1.523 0.007
        3.8314 1.520 0.008
        3.8462 1.518 0.008
        3.8610 1.516 0.006
        3.8760 1.513 0.009
        3.8911 1.511 0.009
        3.9063 1.510 0.010
        3.9216 1.508 0.011
        3.9370 1.507 0.011
        3.9526 1.506 0.011
        3.9683 1.504 0.011
        3.9841 1.501 0.011
        4.0000 1.499 0.012
        4.0161 1.498 0.013
        4.0323 1.496 0.014
        4.0486 1.495 0.015
        4.0650 1.494 0.016
        4.0816 1.493 0.017
        4.0984 1.492 0.017
        4.1152 1.490 0.017
        4.1322 1.489 0.018
        4.1494 1.487 0.018
        4.1667 1.485 0.019
        4.1841 1.484 0.020
        4.2017 1.482 0.021
        4.2194 1.480 0.022
        4.2373 1.479 0.023
        4.2553 1.478 0.024
        4.2735 1.474 0.024
        4.2918 1.472 0.026
        4.3103 1.469 0.029
        4.3290 1.468 0.032
        4.3478 1.468 0.036
        4.3668 1.470 0.040
        4.3860 1.472 0.041
        4.4053 1.473 0.040
        4.4248 1.472 0.040
        4.4444 1.471 0.041
        4.4643 1.471 0.041
        4.4843 1.471 0.042
        4.5045 1.472 0.042
        4.5249 1.470 0.041
        4.5455 1.469 0.041
        4.5662 1.467 0.042
        4.5872 1.466 0.044
        4.6083 1.466 0.043
        4.6296 1.464 0.043
        4.6512 1.460 0.043
        4.6729 1.453 0.047
        4.6948 1.453 0.057
        4.7170 1.459 0.064
        4.7393 1.467 0.063
        4.7619 1.469 0.057
        4.7847 1.468 0.055
        4.8077 1.466 0.055
        4.8309 1.465 0.056
        4.8544 1.465 0.057
        4.8780 1.466 0.058
        4.9020 1.467 0.056
        4.9505 1.466 0.055
        4.9751 1.465 0.053
        4.9261 1.466 0.056
        5.0000 1.464 0.052
        5.0251 1.461 0.052
        5.0505 1.460 0.052
        5.0761 1.459 0.053
        5.1020 1.457 0.054
        5.1282 1.458 0.056
        5.1546 1.460 0.055
        5.1813 1.460 0.052
        5.2083 1.459 0.049
        5.2356 1.457 0.046
        5.2632 1.452 0.044
        5.2910 1.448 0.044
        5.3191 1.444 0.045
        5.3476 1.442 0.046
        5.3763 1.439 0.046
        5.4054 1.436 0.047
        5.4348 1.434 0.048
        5.4645 1.432 0.050
        5.4945 1.430 0.050
        5.5249 1.427 0.049
        5.5556 1.424 0.050
        5.5866 1.421 0.053
        5.6180 1.421 0.054
        5.6497 1.419 0.054
        5.6818 1.417 0.055
        5.7143 1.415 0.056
        5.7471 1.413 0.056
        5.7803 1.411 0.057
        5.8140 1.409 0.056
        5.8480 1.406 0.055
        5.8824 1.403 0.056
        5.9172 1.399 0.057
        5.9524 1.398 0.059
        5.9800 1.395 0.058
        6.0241 1.393 0.057
        6.0606 1.388 0.056
        6.0976 1.381 0.057
        6.1350 1.377 0.061
        6.1728 1.374 0.064
        6.2112 1.374 0.066
        6.2500 1.372 0.065
        6.2893 1.369 0.064
        6.3291 1.365 0.063
        6.3694 1.361 0.065
        6.4103 1.357 0.064
        6.4516 1.352 0.064
        6.4935 1.349 0.064
        6.5359 1.345 0.065
        6.5789 1.341 0.063
        6.6225 1.334 0.060
        6.6667 1.325 0.060
        6.7114 1.319 0.062
        6.7568 1.312 0.062
        6.8027 1.305 0.062
        6.8493 1.297 0.062
        6.8966 1.290 0.064
        6.9444 1.283 0.062
        6.9930 1.273 0.061
        7.0423 1.262 0.061
        7.0922 1.254 0.063
        7.1429 1.242 0.062
        7.1942 1.228 0.062
        7.2464 1.214 0.061
        7.2993 1.200 0.062
        7.3529 1.184 0.063
        7.4074 1.166 0.065
        7.4627 1.151 0.069
        7.5188 1.135 0.068
        7.5758 1.114 0.067
        7.6336 1.090 0.063
        7.6923 1.066 0.065
        7.7519 1.013 0.063
        7.8125 0.995 0.071
        7.8740 0.964 0.072
        7.9365 0.899 0.073
        8.0000 0.852 0.075
        8.0645 0.774 0.081
        8.1301 0.696 0.097
        8.1967 0.596 0.092
        8.2645 0.375 0.114
        8.3333 0.121 0.367
        8.4034 0.100 0.656
        8.4746 0.116 0.882
        8.5470 0.144 1.088
        8.6207 0.177 1.300
        8.6957 0.217 1.528
        8.7719 0.270 1.804
        8.8496 0.356 2.148
        8.9286 0.509 2.633
        9.0090 0.938 3.417
        9.0909 2.390 4.774
        9.1743 4.831 1.355
        9.2593 3.480 0.620
        9.3456 2.966 0.447
        9.4340 2.677 0.375
        9.5238 2.491 0.333
        9.6154 2.353 0.308
        9.7087 2.251 0.291
        9.8039 2.182 0.273
        9.9010 2.115 0.255
        10.0000 2.056 0.252
        10.1010 2.012 0.249
        10.2041 1.978 0.239
        10.3093 1.946 0.231
        10.4167 1.912 0.228
        10.5263 1.889 0.225
        10.6383 1.865 0.227
        10.7527 1.846 0.216
        10.8696 1.821 0.213
        10.9890 1.803 0.213
        11.1111 1.776 0.212
        11.2360 1.763 0.218
        11.3636 1.754 0.218
        11.4943 1.741 0.217
        11.6279 1.729 0.214
        11.7647 1.719 0.216
        11.9048 1.707 0.211
        12.0482 1.693 0.212
        12.1951 1.687 0.208
        12.3457 1.672 0.213
        12.5000 1.657 0.206
        12.6582 1.644 0.205
        12.8205 1.629 0.205
        12.9870 1.612 0.212
        13.1579 1.606 0.215
        13.3333 1.591 0.215
        13.5135 1.580 0.221
        13.6986 1.570 0.222
        13.8889 1.547 0.226
        14.0845 1.535 0.239
        14.2857 1.513 0.256
        14.4928 1.536 0.266
        14.7059 1.533 0.244
        14.9254 1.513 0.212
        15.1515 1.463 0.211
        15.3846 1.423 0.210
        15.6250 1.364 0.219
        15.8730 1.279 0.225
        16.1290 1.133 0.233
        16.3934 0.767 0.469
        16.6667 0.632 1.385
        16.9492 2.771 2.017
        17.2414 2.329 0.202
        17.5439 1.930 0.212
        17.8571 1.795 0.217
        18.1818 1.725 0.219
        18.5185 1.671 0.220
        18.8679 1.631 0.215
        19.2308 1.597 0.213
        19.6078 1.568 0.222
        20.0000 1.544 0.220
        20.4082 1.512 0.210
        20.8333 1.489 0.213
        21.2766 1.463 0.213
        21.7391 1.438 0.215
        22.2222 1.409 0.207
        22.7273 1.375 0.205
        23.2558 1.341 0.204
        23.8095 1.310 0.203
        24.3902 1.275 0.194
        25.0000 1.237 0.178
        25.6410 1.182 0.174
        26.3158 1.120 0.163
        27.0270 1.054 0.141
        27.7778 0.955 0.131
        28.5714 0.803 0.104
        29.4118 0.577 0.124
        30.3030 0.418 0.320
        31.2500 0.308 0.527
        32.2581 0.271 0.752
        33.3333 0.287 0.952
        34.4828 0.324 1.137
        35.7143 0.381 1.356
        37.0370 0.601 1.612
        38.4615 0.995 1.633
        40.0000 1.235 1.374
        41.6667 1.227 1.123
        43.4783 1.160 0.977
        45.4545 1.099 0.797
        47.6190 0.986 0.549
        50.0000 0.438 0.388
        52.6316 0.186 0.724
        55.5556 0.281 0.342