# 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: |
        0.3000 1.442 .0000170
        0.3100 1.442 .0000110
        0.3200 1.442 .0000080
        0.3300 1.442 .0000060
        0.3400 1.442 .0000040
        0.3500 1.442 .0000030
        0.3600 1.442 .0000030
        0.3700 1.442 .0000020
        0.3800 1.442 .0000020
        0.3900 1.442 .0000020
        0.4000 1.442 .0000020
        0.4100 1.442 .0000010
        0.4200 1.442 .0000010
        0.4300 1.442 .0000010
        0.4400 1.442 .0000010
        0.4500 1.442 .0000010
        0.4600 1.442 .0000010
        0.4700 1.442 .0000010
        0.4800 1.442 .0000010
        0.4900 1.442 .0000010
        0.5000 1.442 .0000010
        0.5100 1.442 .0000010
        0.5200 1.442 .0000010
        0.5300 1.442 .0000010
        0.5400 1.442 .0000010
        0.5500 1.442 .0000010
        0.5600 1.442 .0000010
        0.5700 1.442 .0000010
        0.5800 1.442 .0000010
        0.5900 1.442 .0000010
        0.6000 1.442 .0000010
        0.6100 1.442 .0000010
        0.6200 1.442 .0000010
        0.6300 1.442 .0000010
        0.6400 1.442 .0000010
        0.6500 1.442 .0000010
        0.6600 1.442 .0000010
        0.6700 1.442 .0000010
        0.6800 1.442 .0000010
        0.6900 1.442 .0000010
        0.7000 1.442 .0000010
        0.7200 1.442 .0000010
        0.7200 1.442 .0000010
        0.7300 1.442 .0000010
        0.7400 1.442 .0000010
        0.7500 1.442 .0000000
        0.7600 1.442 .0000000
        0.7700 1.442 .0000000
        0.7800 1.442 .0000000
        0.7900 1.442 .0000000
        0.8000 1.442 .0000000
        0.8100 1.442 .0000010
        0.8200 1.442 .0000010
        0.8300 1.442 .0000010
        0.8400 1.442 .0000010
        0.8500 1.442 .0000010
        0.8600 1.442 .0000010
        0.8700 1.442 .0000010
        0.8800 1.442 .0000010
        0.8900 1.442 .0000010
        0.9000 1.442 .0000020
        0.9100 1.442 .0000020
        0.9200 1.442 .0000020
        0.9300 1.442 .0000010
        0.9400 1.442 .0000010
        0.9500 1.442 .0000010
        0.9600 1.442 .0000010
        0.9700 1.442 .0000010
        0.9800 1.442 .0000010
        0.9900 1.442 .0000010
        1.0000 1.442 .0000010
        1.0100 1.442 .0000010
        1.0200 1.442 .0000010
        1.0300 1.442 .0000010
        1.0400 1.442 .0000010
        1.0500 1.442 .0000010
        1.0600 1.442 .0000010
        1.0700 1.442 .0000010
        1.0800 1.442 .0000010
        1.0900 1.442 .0000010
        1.1000 1.442 .0000010
        1.1100 1.442 .0000010
        1.1200 1.442 .0000010
        1.1300 1.442 .0000020
        1.1400 1.442 .0000040
        1.1500 1.442 .0000060
        1.1600 1.442 .0000060
        1.1700 1.442 .0000090
        1.1800 1.442 .0000170
        1.1900 1.442 .0000270
        1.2000 1.442 .0000150
        1.2100 1.442 .0000070
        1.2200 1.442 .0000050
        1.2300 1.442 .0000030
        1.2400 1.442 .0000020
        1.2500 1.442 .0000020
        1.2600 1.442 .0000020
        1.2700 1.442 .0000020
        1.2800 1.442 .0000020
        1.2900 1.442 .0000020
        1.3000 1.441 .0000020
        1.3100 1.441 .0000020
        1.3200 1.441 .0000010
        1.3300 1.441 .0000020
        1.3400 1.441 .0000020
        1.3500 1.441 .0000040
        1.3600 1.441 .0000080
        1.3700 1.441 .0000110
        1.3800 1.441 .0000150
        1.3900 1.441 .0000180
        1.4000 1.441 .0000150
        1.4100 1.441 .0000150
        1.4200 1.441 .0000110
        1.4300 1.441 .0000110
        1.4400 1.441 .0000090
        1.4500 1.441 .0000070
        1.4600 1.441 .0000060
        1.4700 1.441 .0000070
        1.4800 1.441 .0000060
        1.4900 1.441 .0000060
        1.5000 1.441 .0000040
        1.5100 1.441 .0000040
        1.5200 1.441 .0000030
        1.5300 1.441 .0000030
        1.5400 1.441 .0000030
        1.5500 1.441 .0000030
        1.5600 1.441 .0000030
        1.5700 1.441 .0000030
        1.5800 1.441 .0000020
        1.5900 1.441 .0000030
        1.6000 1.441 .0000030
        1.6100 1.441 .0000040
        1.6200 1.441 .0000060
        1.6300 1.441 .0000070
        1.6400 1.441 .0000080
        1.6500 1.441 .0000090
        1.6600 1.441 .0000110
        1.6700 1.441 .0000170
        1.6800 1.441 .0000500
        1.6900 1.441 .0001210
        1.7000 1.441 .0001600
        1.7100 1.441 .0001140
        1.7200 1.441 .0001070
        1.7300 1.441 .0001460
        1.7400 1.441 .0001760
        1.7500 1.441 .0002480
        1.7600 1.441 .0001790
        1.7700 1.441 .0000900
        1.7800 1.441 .0000490
        1.7900 1.441 .0000350
        1.8000 1.441 .0000240
        1.8100 1.441 .0000180
        1.8200 1.441 .0000220
        1.8300 1.441 .0000300
        1.8400 1.441 .0000400
        1.8500 1.441 .0000420
        1.8600 1.441 .0000340
        1.8700 1.441 .0000230
        1.8800 1.441 .0000200
        1.8900 1.441 .0000220
        1.9000 1.441 .0000260
        1.9100 1.441 .0000290
        1.9200 1.441 .0000330
        1.9300 1.441 .0000300
        1.9400 1.441 .0000260
        1.9500 1.441 .0000230
        1.9600 1.441 .0000200
        1.9700 1.441 .0000200
        1.9800 1.441 .0000210
        1.9900 1.441 .0000270
        2.0000 1.441 .0000300
        2.0100 1.441 .0000350
        2.0200 1.441 .0000360
        2.0300 1.441 .0000360
        2.0400 1.441 .0000320
        2.0500 1.441 .0000280
        2.0600 1.440 .0000240
        2.0700 1.440 .0000210
        2.0800 1.440 .0000210
        2.0900 1.440 .0000230
        2.1000 1.440 .0000260
        2.1100 1.440 .0000300
        2.1200 1.440 .0000310
        2.1300 1.440 .0000310
        2.1400 1.440 .0000340
        2.1500 1.440 .0000370
        2.1600 1.440 .0000390
        2.1700 1.440 .0000420
        2.1800 1.440 .0000470
        2.1900 1.440 .0000490
        2.2000 1.440 .0000550
        2.2100 1.440 .0000690
        2.2200 1.440 .0000830
        2.2300 1.440 .0000970
        2.2400 1.440 .0001230
        2.2500 1.440 .0001890
        2.2600 1.439 .0004310
        2.2700 1.440 .0007510
        2.2800 1.440 .0007800
        2.2900 1.440 .0008930
        2.3000 1.440 .0011280
        2.3100 1.440 .0009750
        2.3200 1.440 .0006860
        2.3300 1.440 .0004630
        2.3400 1.440 .0004020
        2.3500 1.440 .0005550
        2.3600 1.440 .0006840
        2.3700 1.440 .0007700
        2.3800 1.440 .0006650
        2.3900 1.440 .0005470
        2.4000 1.440 .0005380
        2.4100 1.440 .0004200
        2.4200 1.440 .0003170
        2.4300 1.440 .0002820
        2.4400 1.440 .0002470
        2.4500 1.440 .0002710
        2.4600 1.440 .0003370
        2.4700 1.440 .0002950
        2.4800 1.440 .0002850
        2.4900 1.440 .0003470
        2.5000 1.440 .0003840
        2.5063 1.440 .0003710
        2.5126 1.440 .0003700
        2.5189 1.440 .0003890
        2.5253 1.440 .0003940
        2.5316 1.440 .0003740
        2.5381 1.440 .0003480
        2.5445 1.440 .0003250
        2.5510 1.440 .0003110
        2.5575 1.440 .0002980
        2.5641 1.440 .0002730
        2.5707 1.440 .0002400
        2.5773 1.440 .0002070
        2.5840 1.440 .0001770
        2.5907 1.440 .0001570
        2.5974 1.440 .0001520
        2.6042 1.439 .0001500
        2.6110 1.439 .0001350
        2.6178 1.439 .0001140
        2.6247 1.439 .0000970
        2.6316 1.439 .0000980
        2.6385 1.439 .0001090
        2.6455 1.439 .0001200
        2.6525 1.439 .0001330
        2.6596 1.439 .0001560
        2.6667 1.439 .0001800
        2.6738 1.439 .0001960
        2.6810 1.439 .0002090
        2.6882 1.439 .0002220
        2.6954 1.439 .0002320
        2.7027 1.439 .0002410
        2.7100 1.439 .0002460
        2.7174 1.439 .0002430
        2.7248 1.439 .0002440
        2.7322 1.439 .0002470
        2.7397 1.439 .0002470
        2.7473 1.439 .0002490
        2.7548 1.439 .0002570
        2.7624 1.439 .0002630
        2.7701 1.439 .0002560
        2.7778 1.439 .0002390
        2.7855 1.439 .0002250
        2.7933 1.438 .0002190
        2.8011 1.438 .0002220
        2.8090 1.438 .0002230
        2.8169 1.438 .0002190
        2.8249 1.438 .0002100
        2.8329 1.438 .0002090
        2.8409 1.438 .0002150
        2.8409 1.438 .0002170
        2.8571 1.438 .0002010
        2.8653 1.438 .0001880
        2.8736 1.438 .0001800
        2.8818 1.438 .0001750
        2.8902 1.438 .0001670
        2.8986 1.438 .0001610
        2.9070 1.438 .0001580
        2.9155 1.437 .0001520
        2.9240 1.437 .0001420
        2.9326 1.437 .0001330
        2.9412 1.437 .0001340
        2.9499 1.437 .0001440
        2.9586 1.437 .0001550
        2.9674 1.437 .0001670
        2.9762 1.437 .0001960
        2.9851 1.436 .0002390
        2.9940 1.436 .0002680
        3.0030 1.436 .0002840
        3.0120 1.436 .0003030
        3.0211 1.436 .0003300
        3.0303 1.436 .0003340
        3.0395 1.436 .0003220
        3.0488 1.436 .0003350
        3.0581 1.435 .0003630
        3.0675 1.435 .0003680
        3.0769 1.435 .0003750
        3.0864 1.435 .0004140
        3.0960 1.435 .0004800
        3.1056 1.434 .0005620
        3.1153 1.434 .0006480
        3.1250 1.434 .0007150
        3.1348 1.433 .0007650
        3.1348 1.434 .0007450
        3.1447 1.433 .0007530
        3.1646 1.433 .0007860
        3.1746 1.433 .0007960
        3.1847 1.432 .0007850
        3.1949 1.432 .0007760
        3.2051 1.431 .0007880
        3.2154 1.431 .0008360
        3.2258 1.430 .0009220
        3.2362 1.429 .0010430
        3.2468 1.428 .0011700
        3.2573 1.427 .0013200
        3.2680 1.426 .0014710
        3.2787 1.425 .0016670
        3.2895 1.423 .0019860
        3.3003 1.421 .0024410
        3.3113 1.418 .0030250
        3.3223 1.414 .0041230
        3.3333 1.408 .0074600
        3.3445 1.400 .0147670
        3.3557 1.393 .0315250
        3.3670 1.409 .0602020
        3.3784 1.440 .0552870
        3.3898 1.443 .0352530
        3.4014 1.433 .0345340
        3.4130 1.438 .0500450
        3.4247 1.458 .0498260
        3.4364 1.465 .0350820
        3.4483 1.464 .0244700
        3.4602 1.458 .0195440
        3.4722 1.454 .0222750
        3.4843 1.459 .0264840
        3.4965 1.465 .0212510
        3.5088 1.466 .0150300
        3.5211 1.465 .0100150
        3.5336 1.463 .0068600
        3.5461 1.461 .0044050
        3.5587 1.459 .0027090
        3.5714 1.457 .0018490
        3.5842 1.455 .0013920
        3.5971 1.454 .0011000
        3.6101 1.453 .0009180
        3.6232 1.452 .0008270
        3.6364 1.451 .0008470
        3.6496 1.450 .0010870
        3.6630 1.449 .0015360
        3.6765 1.449 .0014550
        3.6900 1.449 .0011620
        3.7037 1.449 .0010970
        3.7175 1.448 .0010630
        3.7313 1.448 .0008790
        3.7453 1.448 .0006400
        3.7594 1.448 .0004980
        3.7736 1.447 .0004070
        3.7879 1.447 .0003460
        3.8023 1.447 .0003060
        3.8168 1.446 .0002800
        3.8314 1.446 .0002760
        3.8462 1.446 .0002750
        3.8610 1.446 .0002540
        3.8760 1.445 .0002330
        3.8911 1.445 .0002340
        3.9063 1.445 .0002520
        3.9216 1.445 .0002570
        3.9370 1.445 .0002620
        3.9526 1.444 .0003030
        3.9683 1.444 .0003560
        3.9841 1.444 .0003730
        4.0000 1.444 .0003850
        4.0161 1.444 .0003960
        4.0323 1.444 .0004340
        4.0486 1.444 .0004750
        4.0650 1.444 .0004630
        4.0816 1.444 .0004530
        4.0984 1.443 .0004190
        4.1152 1.443 .0004450
        4.1322 1.443 .0006540
        4.1494 1.443 .0007190
        4.1667 1.443 .0005290
        4.1841 1.443 .0004410
        4.2017 1.443 .0003570
        4.2194 1.443 .0003000
        4.2373 1.443 .0003230
        4.2553 1.443 .0004240
        4.2735 1.443 .0004390
        4.2918 1.443 .0003390
        4.3103 1.443 .0002560
        4.3290 1.442 .0002320
        4.3478 1.442 .0002460
        4.3668 1.442 .0002730
        4.3860 1.442 .0002840
        4.4053 1.442 .0002940
        4.4248 1.442 .0003740
        4.4444 1.442 .0004870
        4.4643 1.442 .0005750
        4.4843 1.442 .0006640
        4.5045 1.442 .0006470
        4.5249 1.442 .0005260
        4.5455 1.442 .0004420
        4.5662 1.442 .0004050
        4.5872 1.442 .0003940
        4.6083 1.441 .0003960
        4.6296 1.441 .0004510
        4.6512 1.441 .0004270
        4.6729 1.441 .0003380
        4.6948 1.441 .0002670
        4.7170 1.441 .0002830
        4.7393 1.441 .0002970
        4.7619 1.441 .0002440
        4.7847 1.441 .0002370
        4.8077 1.441 .0002720
        4.8309 1.441 .0003140
        4.8544 1.441 .0003020
        4.8780 1.440 .0002530
        4.9020 1.440 .0002360
        4.9261 1.440 .0002890
        4.9505 1.440 .0003870
        4.9751 1.440 .0004210
        5.0000 1.440 .0003480
        5.0251 1.440 .0003040
        5.0505 1.440 .0003010
        5.0761 1.440 .0002980
        5.1020 1.440 .0003120
        5.1282 1.439 .0003280
        5.1546 1.439 .0003440
        5.1813 1.439 .0003220
        5.2083 1.439 .0002690
        5.2356 1.439 .0002250
        5.2632 1.439 .0002180
        5.2910 1.439 .0002340
        5.3191 1.439 .0002280
        5.3476 1.438 .0002010
        5.3763 1.438 .0001940
        5.4054 1.438 .0002250
        5.4348 1.438 .0002650
        5.4645 1.438 .0002850
        5.4945 1.437 .0003280
        5.5249 1.437 .0003860
        5.5556 1.437 .0004110
        5.5866 1.436 .0004390
        5.6180 1.436 .0004880
        5.6497 1.436 .0006110
        5.6818 1.435 .0008740
        5.7143 1.434 .0018180
        5.7471 1.434 .0044310
        5.7803 1.437 .0061350
        5.8140 1.439 .0036330
        5.8480 1.438 .0014780
        5.8824 1.437 .0011560
        5.9172 1.436 .0011140
        5.9524 1.436 .0010960
        5.9880 1.436 .0010750
        6.0241 1.435 .0010840
        6.0606 1.435 .0011140
        6.0976 1.434 .0011410
        6.1350 1.434 .0011630
        6.1728 1.433 .0012280
        6.2112 1.433 .0013510
        6.2500 1.433 .0014550
        6.2893 1.432 .0013630
        6.3291 1.431 .0015570
        6.3694 1.431 .0015040
        6.4103 1.430 .0015140
        6.4516 1.429 .0015900
        6.4935 1.428 .0017310
        6.5359 1.426 .0019720
        6.5789 1.424 .0023270
        6.6225 1.422 .0028210
        6.6667 1.419 .0036840
        6.7114 1.415 .0051150
        6.7568 1.407 .0082490
        6.8027 1.397 .0202110
        6.8493 1.401 .0499080
        6.8966 1.436 .0666030
        6.9444 1.457 .0400640
        6.9930 1.454 .0282970
        7.0423 1.455 .0213940
        7.0922 1.452 .0126820
        7.1429 1.445 .0088750
        7.1942 1.435 .0098870
        7.2464 1.434 .0295170
        7.2993 1.456 .0282030
        7.3529 1.456 .0082880
        7.4074 1.448 .0040780
        7.4627 1.443 .0036310
        7.5188 1.439 .0036870
        7.5758 1.435 .0044120
        7.6336 1.431 .0054760
        7.6923 1.425 .0076030
        7.7519 1.418 .0131290
        7.8125 1.403 .0238160
        7.8740 1.407 .0376340
        7.9365 1.424 .0827380
        8.0000 1.482 .0705720
        8.0645 1.490 .0278960
        8.1301 1.478 .0105220
        8.1967 1.468 .0049410
        8.2645 1.461 .0035110
        8.3333 1.456 .0031010
        8.4034 1.453 .0029010
        8.4746 1.450 .0028980
        8.5470 1.448 .0032530
        8.6207 1.446 .0039230
        8.6957 1.443 .0047890
        8.7719 1.441 .0066310
        8.8496 1.440 .0090440
        8.9286 1.439 .0116690
        9.0090 1.439 .0142570
        9.0909 1.441 .0173720
        9.1743 1.443 .0177190
        9.2593 1.443 .0207770
        9.3458 1.450 .0221940
        9.4340 1.451 .0157310
        9.5238 1.448 .0156140
        9.6154 1.449 .0172660
        9.7087 1.449 .0181730
        9.8039 1.452 .0198380
        9.9010 1.456 .0178460
        10.0000 1.455 .0120000
        10.1010 1.449 .0114580
        10.2041 1.446 .0229090
        10.3093 1.463 .0267410
        10.4167 1.468 .0111650
        10.5263 1.463 .0055440
        10.6383 1.459 .0034490
        10.7527 1.457 .0025830
        10.8696 1.455 .0021650
        10.9890 1.453 .0019940
        11.1111 1.451 .0021160
        11.2360 1.449 .0026180
        11.3636 1.448 .0038600
        11.4943 1.447 .0044330
        11.6279 1.447 .0043180
        11.7647 1.445 .0039780
        11.9048 1.441 .0048370
        12.0482 1.437 .0082540
        12.1951 1.436 .0163120
        12.3457 1.441 .0230860
        12.5000 1.447 .0258210
        12.6582 1.453 .0269970
        12.8205 1.461 .0237840
        12.9870 1.463 .0174240
        13.1579 1.464 .0128190
        13.3333 1.461 .0083940
        13.5135 1.460 .0104650
        13.6986 1.462 .0079200
        13.8889 1.459 .0041280
        14.0845 1.456 .0041520
        14.2857 1.453 .0079500
        14.4928 1.458 .0106870
        14.7059 1.460 .0062650
        14.9254 1.458 .0039020
        15.1515 1.456 .0054830
        15.3846 1.457 .0057530
        15.6250 1.458 .0068620
        15.8730 1.460 .0045710
        16.1290 1.459 .0023240
        16.3934 1.458 .0015960
        16.6667 1.457 .0013100
        16.9492 1.456 .0012040
        17.2414 1.455 .0013160
        17.5439 1.455 .0014040
        17.8571 1.455 .0013880
        18.1818 1.454 .0013630
        18.5185 1.454 .0014880
        18.8679 1.454 .0016490
        19.2308 1.454 .0018280
        19.6078 1.454 .0020880