# 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: |
        0.5000 2.693 0.0000121
        0.5200 2.650 0.0000043
        0.5400 2.620 0.0000015
        0.5600 2.596 0.0000008
        0.5800 2.578 0.0000006
        0.6000 2.560 0.0000005
        0.6200 2.548 0.0000004
        0.6400 2.537 0.0000004
        0.6600 2.528 0.0000004
        0.6800 2.521 0.0000003
        0.7000 2.516 0.0000003
        0.7200 2.510 0.0000003
        0.7400 2.504 0.0000003
        0.7600 2.497 0.0000003
        0.7800 2.489 0.0000003
        0.8000 2.482 0.0000003
        0.8200 2.476 0.0000002
        0.8400 2.470 0.0000002
        0.8600 2.468 0.0000002
        0.8800 2.466 0.0000002
        0.9000 2.464 0.0000002
        0.9200 2.464 0.0000002
        0.9400 2.464 0.0000002
        0.9600 2.462 0.0000002
        0.9800 2.461 0.0000002
        1.0000 2.460 0.0000002
        1.0200 2.459 0.0000001
        1.0400 2.459 0.0000001
        1.0600 2.458 0.0000001
        1.0800 2.458 0.0000001
        1.1000 2.458 0.0000001
        1.1200 2.457 0.0000001
        1.1400 2.456 0.0000001
        1.1600 2.456 0.0000001
        1.1800 2.454 0.0000001
        1.2000 2.454 0.0000001
        1.2200 2.453 0.0000001
        1.2400 2.452 0.0000001
        1.2600 2.451 0.0000001
        1.2800 2.450 0.0000001
        1.3000 2.449 0.0000000
        1.3200 2.449 0.0000000
        1.3400 2.448 0.0000000
        1.3600 2.448 0.0000000
        1.3800 2.447 0.0000000
        1.4000 2.447 0.0000000
        1.4200 2.446 0.0000000
        1.4400 2.445 0.0000000
        1.4600 2.445 0.0000000
        1.4800 2.444 0.0000000
        1.5000 2.444 0.0000000
        1.5200 2.444 0.0000000
        1.5400 2.443 0.0000000
        1.5600 2.441 0.0000000
        1.5800 2.441 0.0000000
        1.6000 2.440 0.0000000
        1.6200 2.439 0.0000000
        1.6400 2.439 0.0000000
        1.6600 2.438 0.0000000
        1.6800 2.438 0.0000000
        1.7000 2.437 0.0000000
        1.7200 2.437 0.0000000
        1.7400 2.436 0.0000000
        1.7600 2.436 0.0000000
        1.7800 2.435 0.0000000
        1.8000 2.435 0.0000000
        1.8200 2.434 0.0000000
        1.8400 2.433 0.0000000
        1.8600 2.432 0.0000000
        1.8800 2.432 0.0000000
        1.9000 2.432 0.0000000
        1.9200 2.432 0.0000000
        1.9400 2.431 0.0000000
        1.9600 2.431 0.0000000
        1.9800 2.431 0.0000000
        2.0000 2.431 0.0000000
        2.0200 2.430 0.0000000
        2.0400 2.429 0.0000000
        2.0600 2.428 0.0000000
        2.0800 2.428 0.0000000
        2.1000 2.428 0.0000000
        2.1200 2.427 0.0000000
        2.1400 2.427 0.0000000
        2.1600 2.426 0.0000000
        2.1800 2.426 0.0000000
        2.2000 2.425 0.0000000
        2.2200 2.426 0.0000000
        2.2400 2.425 0.0000000
        2.2600 2.425 0.0000000
        2.2800 2.424 0.0000000
        2.3000 2.424 0.0000000
        2.3200 2.424 0.0000000
        2.3400 2.424 0.0000000
        2.3600 2.423 0.0000000
        2.3800 2.423 0.0000000
        2.4000 2.423 0.0000000
        2.4200 2.422 0.0000000
        2.4400 2.422 0.0000000
        2.4600 2.422 0.0000000
        2.4800 2.422 0.0000000
        2.5000 2.421 0.0000000
        2.5126 2.421 0.0000000
        2.5253 2.421 0.0000000
        2.5381 2.421 0.0000000
        2.5510 2.421 0.0000000
        2.5641 2.421 0.0000000
        2.5773 2.421 0.0000000
        2.5907 2.421 0.0000000
        2.6042 2.421 0.0000000
        2.6178 2.420 0.0000000
        2.6316 2.420 0.0000000
        2.6455 2.420 0.0000000
        2.6596 2.420 0.0000000
        2.6738 2.420 0.0000000
        2.6882 2.419 0.0000000
        2.7027 2.419 0.0000000
        2.7174 2.419 0.0000000
        2.7322 2.419 0.0000000
        2.7473 2.419 0.0000000
        2.7624 2.419 0.0000000
        2.7778 2.418 0.0000000
        2.7933 2.418 0.0000000
        2.8090 2.418 0.0000000
        2.8249 2.418 0.0000000
        2.8409 2.419 0.0000000
        2.8571 2.418 0.0000000
        2.8736 2.418 0.0000000
        2.8902 2.418 0.0000000
        2.9070 2.418 0.0000000
        2.9240 2.417 0.0000000
        2.9412 2.417 0.0000000
        2.9586 2.417 0.0000000
        2.9762 2.416 0.0000000
        2.9940 2.417 0.0000000
        3.0120 2.416 0.0000000
        3.0303 2.416 0.0000000
        3.0488 2.416 0.0000000
        3.0675 2.416 0.0000000
        3.0864 2.416 0.0000000
        3.1056 2.416 0.0000000
        3.1250 2.416 0.0000000
        3.1447 2.415 0.0000000
        3.1646 2.415 0.0000000
        3.1847 2.415 0.0000000
        3.2051 2.414 0.0000000
        3.2258 2.414 0.0000000
        3.2468 2.414 0.0000000
        3.2680 2.413 0.0000000
        3.2895 2.414 0.0000000
        3.3113 2.413 0.0000000
        3.3333 2.413 0.0000000
        3.3557 2.414 0.0000000
        3.3784 2.414 0.0000000
        3.4014 2.416 0.0000000
        3.4247 2.415 0.0000000
        3.4483 2.414 0.0000000
        3.4722 2.414 0.0000000
        3.4965 2.414 0.0000000
        3.5211 2.414 0.0000000
        3.5461 2.413 0.0000000
        3.5714 2.413 0.0000000
        3.5971 2.413 0.0000000
        3.6232 2.413 0.0000000
        3.6496 2.413 0.0000000
        3.6765 2.414 0.0000000
        3.7037 2.414 0.0000000
        3.7313 2.414 0.0000000
        3.7594 2.413 0.0000000
        3.7879 2.413 0.0000000
        3.8168 2.414 0.0000000
        3.8462 2.414 0.0000000
        3.8760 2.414 0.0000000
        3.9063 2.414 0.0000000
        3.9370 2.414 0.0000000
        3.9683 2.415 0.0000000
        4.0000 2.416 0.0000000
        4.0323 2.414 0.0000000
        4.0650 2.416 0.0000000
        4.0984 2.417 0.0000000
        4.1322 2.416 0.0000000
        4.1667 2.417 0.0000000
        4.2017 2.417 0.0000000
        4.2373 2.417 0.0000001
        4.2735 2.417 0.0000001
        4.3103 2.417 0.0000001
        4.3478 2.416 0.0000001
        4.3860 2.416 0.0000002
        4.4248 2.416 0.0000002
        4.4643 2.416 0.0000002
        4.5045 2.415 0.0000002
        4.5455 2.415 0.0000002
        4.5872 2.415 0.0000003
        4.6296 2.415 0.0000003
        4.6729 2.415 0.0000003
        4.7170 2.415 0.0000003
        4.7619 2.415 0.0000003
        4.8077 2.415 0.0000003
        4.8544 2.415 0.0000004
        4.9020 2.415 0.0000004
        4.9505 2.415 0.0000004
        5.0000 2.415 0.0000004
        5.0505 2.415 0.0000004
        5.1020 2.415 0.0000004
        5.1546 2.415 0.0000004
        5.2083 2.415 0.0000004
        5.2632 2.415 0.0000005
        5.3191 2.415 0.0000005
        5.3763 2.415 0.0000005
        5.4348 2.415 0.0000005
        5.4945 2.415 0.0000005
        5.5556 2.414 0.0000005
        5.6180 2.414 0.0000005
        5.6818 2.414 0.0000006
        5.7471 2.414 0.0000006
        5.8140 2.414 0.0000006
        5.8824 2.413 0.0000006
        5.9524 2.413 0.0000007
        6.0241 2.413 0.0000009
        6.0976 2.413 0.0000011
        6.1728 2.413 0.0000012
        6.2500 2.413 0.0000010
        6.3291 2.413 0.0000008
        6.4103 2.413 0.0000008
        6.4935 2.413 0.0000008
        6.5789 2.412 0.0000007
        6.6667 2.412 0.0000007
        6.7568 2.411 0.0000007
        6.8493 2.411 0.0000007
        6.9444 2.411 0.0000008
        7.0423 2.410 0.0000007
        7.1429 2.410 0.0000008
        7.2464 2.409 0.0000008
        7.3529 2.409 0.0000008
        7.4627 2.409 0.0000008
        7.5758 2.408 0.0000008
        7.6923 2.408 0.0000008
        7.8125 2.407 0.0000009
        7.9365 2.406 0.0000009
        8.0645 2.406 0.0000008
        8.1967 2.406 0.0000009
        8.3333 2.405 0.0000009
        8.4746 2.404 0.0000009
        8.6207 2.404 0.0000009
        8.7719 2.403 0.0000010
        8.9286 2.402 0.0000010
        9.0909 2.401 0.0000011
        9.2593 2.401 0.0000010
        9.4340 2.401 0.0000010
        9.6154 2.400 0.0000011
        9.8039 2.399 0.0000011
        10.0000 2.399 0.0000009
        10.2041 2.398 0.0000009
        10.4167 2.397 0.0000009
        10.6383 2.395 0.0000009
        10.8696 2.395 0.0000008
        11.1111 2.393 0.0000008
        11.3636 2.392 0.0000008
        11.6279 2.390 0.0000008
        11.9048 2.388 0.0000008
        12.1951 2.387 0.0000007
        12.5000 2.384 0.0000008
        12.8205 2.382 0.0000007
        13.1579 2.379 0.0000007
        13.5135 2.376 0.0000011
        13.8889 2.373 0.0000017
        14.2857 2.369 0.0000034
        14.7059 2.366 0.0000066
        15.1515 2.362 0.0000152
        15.6250 2.357 0.0000322
        16.1290 2.351 0.0000560
        16.6667 2.345 0.0000555
        17.2414 2.337 0.0000783
        17.8571 2.328 0.0000839
        18.5185 2.317 0.0001019
        19.2308 2.304 0.0001839
        20.0000 2.291 0.0004232
        20.8333 2.275 0.0007723
        21.7391 2.257 0.0013358