# 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: |
    T. Klinavičius, A. Tamulevičienė, T. Tamulevičius.
    How to select the proper gold permittivity for generating training data for deep neural networks for analysis of the nanoparticle colloid size distributions from their UV–Vis–NIR extinction spectra?
    <a href="https://doi.org/10.1021/acs.jpcc.5c03973"><i>J. Phys. Chem. C</i> <b>129</b>, 17616-17631 (2025)</a>
    (See Supporting information)
COMMENTS: |
    19.7 nm average radius chemically synthesized spherical gold nanoparticles. Colloid solution in water.
DATA:
  - type: tabulated nk
    data: |
        0.400 1.9201590 2.1905490
        0.401 1.9228733 2.1915870
        0.402 1.9253713 2.1925014
        0.403 1.9276520 2.1932926
        0.404 1.9297144 2.1939609
        0.405 1.9315574 2.1945067
        0.406 1.9331801 2.1949306
        0.407 1.9345817 2.1952333
        0.408 1.9357613 2.1954154
        0.409 1.9367181 2.1954778
        0.410 1.9374514 2.1954214
        0.411 1.9379603 2.1952470
        0.412 1.9382444 2.1949559
        0.413 1.9383029 2.1945490
        0.414 1.9381352 2.1940278
        0.415 1.9377409 2.1933934
        0.416 1.9371195 2.1926473
        0.417 1.9362705 2.1917910
        0.418 1.9351936 2.1908261
        0.419 1.9338884 2.1897543
        0.420 1.9323545 2.1885773
        0.421 1.9305918 2.1872971
        0.422 1.9286000 2.1859155
        0.423 1.9263789 2.1844346
        0.424 1.9239285 2.1828566
        0.425 1.9212486 2.1811838
        0.426 1.9183392 2.1794183
        0.427 1.9152003 2.1775627
        0.428 1.9118320 2.1756195
        0.429 1.9082344 2.1735913
        0.430 1.9044076 2.1714808
        0.431 1.9003517 2.1692908
        0.432 1.8960671 2.1670242
        0.433 1.8915539 2.1646841
        0.434 1.8868126 2.1622735
        0.435 1.8818435 2.1597955
        0.436 1.8766469 2.1572536
        0.437 1.8712234 2.1546511
        0.438 1.8655735 2.1519914
        0.439 1.8596976 2.1492783
        0.440 1.8535965 2.1465152
        0.441 1.8472707 2.1437062
        0.442 1.8407210 2.1408549
        0.443 1.8339481 2.1379655
        0.444 1.8269528 2.1350420
        0.445 1.8197359 2.1320886
        0.446 1.8122984 2.1291095
        0.447 1.8046412 2.1261093
        0.448 1.7967654 2.1230922
        0.449 1.7886720 2.1200630
        0.450 1.7803622 2.1170263
        0.451 1.7718371 2.1139869
        0.452 1.7630981 2.1109497
        0.453 1.7541464 2.1079197
        0.454 1.7449836 2.1049019
        0.455 1.7356109 2.1019016
        0.456 1.7260301 2.0989239
        0.457 1.7162427 2.0959743
        0.458 1.7062505 2.0930583
        0.459 1.6960552 2.0901813
        0.460 1.6856587 2.0873491
        0.461 1.6750630 2.0845673
        0.462 1.6642702 2.0818419
        0.463 1.6532825 2.0791786
        0.464 1.6421021 2.0765836
        0.465 1.6307314 2.0740628
        0.466 1.6191729 2.0716225
        0.467 1.6074293 2.0692688
        0.468 1.5955033 2.0670080
        0.469 1.5833978 2.0648466
        0.470 1.5711158 2.0627908
        0.471 1.5586605 2.0608472
        0.472 1.5460352 2.0590223
        0.473 1.5332433 2.0573227
        0.474 1.5202885 2.0557548
        0.475 1.5071746 2.0543255
        0.476 1.4939055 2.0530412
        0.477 1.4804853 2.0519086
        0.478 1.4669185 2.0509344
        0.479 1.4532094 2.0501252
        0.480 1.4393628 2.0494876
        0.481 1.4253836 2.0490282
        0.482 1.4112769 2.0487535
        0.483 1.3970481 2.0486700
        0.484 1.3827025 2.0487840
        0.485 1.3682460 2.0491019
        0.486 1.3536846 2.0496299
        0.487 1.3390243 2.0503740
        0.488 1.3242715 2.0513402
        0.489 1.3094328 2.0525342
        0.490 1.2945151 2.0539617
        0.491 1.2795253 2.0556281
        0.492 1.2644707 2.0575386
        0.493 1.2493586 2.0596981
        0.494 1.2341967 2.0621114
        0.495 1.2189927 2.0647830
        0.496 1.2037546 2.0677171
        0.497 1.1884905 2.0709174
        0.498 1.1732086 2.0743877
        0.499 1.1579174 2.0781311
        0.500 1.1426253 2.0821504
        0.501 1.1273409 2.0864483
        0.502 1.1120729 2.0910267
        0.503 1.0968300 2.0958875
        0.504 1.0816210 2.1010321
        0.505 1.0664546 2.1064612
        0.506 1.0513396 2.1121755
        0.507 1.0362847 2.1181750
        0.508 1.0212985 2.1244594
        0.509 1.0063896 2.1310280
        0.510 0.9915665 2.1378795
        0.511 0.9768374 2.1450124
        0.512 0.9622105 2.1524247
        0.513 0.9476938 2.1601139
        0.514 0.9332949 2.1680773
        0.515 0.9190215 2.1763118
        0.516 0.9048807 2.1848136
        0.517 0.8908795 2.1935790
        0.518 0.8770246 2.2026038
        0.519 0.8633225 2.2118834
        0.520 0.8497791 2.2214129
        0.521 0.8364002 2.2311874
        0.522 0.8231911 2.2412014
        0.523 0.8101568 2.2514494
        0.524 0.7973021 2.2619257
        0.525 0.7846313 2.2726242
        0.526 0.7721481 2.2835390
        0.527 0.7598563 2.2946637
        0.528 0.7477590 2.3059920
        0.529 0.7358590 2.3175176
        0.530 0.7241588 2.3292339
        0.531 0.7126605 2.3411345
        0.532 0.7013658 2.3532126
        0.533 0.6902763 2.3654619
        0.534 0.6793930 2.3778757
        0.535 0.6687168 2.3904475
        0.536 0.6582480 2.4031709
        0.537 0.6479869 2.4160394
        0.538 0.6379335 2.4290468
        0.539 0.6280873 2.4421866
        0.540 0.6184478 2.4554528
        0.541 0.6090141 2.4688393
        0.542 0.5997852 2.4823401
        0.543 0.5907598 2.4959494
        0.544 0.5819364 2.5096614
        0.545 0.5733134 2.5234706
        0.546 0.5648890 2.5373715
        0.547 0.5566611 2.5513588
        0.548 0.5486277 2.5654273
        0.549 0.5407865 2.5795720
        0.550 0.5331351 2.5937879
        0.551 0.5256710 2.6080703
        0.552 0.5183917 2.6224146
        0.553 0.5112945 2.6368163
        0.554 0.5043766 2.6512710
        0.555 0.4976353 2.6657746
        0.556 0.4910676 2.6803229
        0.557 0.4846706 2.6949122
        0.558 0.4784415 2.7095385
        0.559 0.4723771 2.7241982
        0.560 0.4664744 2.7388877
        0.561 0.4607305 2.7536037
        0.562 0.4551423 2.7683429
        0.563 0.4497066 2.7831020
        0.564 0.4444205 2.7978781
        0.565 0.4392808 2.8126681
        0.566 0.4342845 2.8274693
        0.567 0.4294285 2.8422789
        0.568 0.4247099 2.8570943
        0.569 0.4201256 2.8719130
        0.570 0.4156726 2.8867325
        0.571 0.4113479 2.9015505
        0.572 0.4071486 2.9163647
        0.573 0.4030718 2.9311730
        0.574 0.3991146 2.9459733
        0.575 0.3952742 2.9607636
        0.576 0.3915478 2.9755420
        0.577 0.3879326 2.9903067
        0.578 0.3844258 3.0050559
        0.579 0.3810249 3.0197879
        0.580 0.3777271 3.0345010
        0.581 0.3745298 3.0491938
        0.582 0.3714305 3.0638647
        0.583 0.3684267 3.0785122
        0.584 0.3655159 3.0931351
        0.585 0.3626956 3.1077319
        0.586 0.3599636 3.1223014
        0.587 0.3573175 3.1368425
        0.588 0.3547549 3.1513539
        0.589 0.3522737 3.1658345
        0.590 0.3498717 3.1802834
        0.591 0.3475466 3.1946993
        0.592 0.3452965 3.2090815
        0.593 0.3431192 3.2234289
        0.594 0.3410128 3.2377407
        0.595 0.3389753 3.2520160
        0.596 0.3370047 3.2662541
        0.597 0.3350992 3.2804541
        0.598 0.3332570 3.2946153
        0.599 0.3314763 3.3087370
        0.600 0.3297553 3.3228187
        0.601 0.3280923 3.3368595
        0.602 0.3264858 3.3508589
        0.603 0.3249339 3.3648165
        0.604 0.3234353 3.3787315
        0.605 0.3219882 3.3926036
        0.606 0.3205914 3.4064322
        0.607 0.3192432 3.4202169
        0.608 0.3179422 3.4339573
        0.609 0.3166872 3.4476529
        0.610 0.3154767 3.4613034
        0.611 0.3143094 3.4749085
        0.612 0.3131840 3.4884677
        0.613 0.3120994 3.5019809
        0.614 0.3110543 3.5154477
        0.615 0.3100475 3.5288678
        0.616 0.3090779 3.5422411
        0.617 0.3081444 3.5555673
        0.618 0.3072459 3.5688462
        0.619 0.3063814 3.5820776
        0.620 0.3055499 3.5952614
        0.621 0.3047503 3.6083974
        0.622 0.3039817 3.6214855
        0.623 0.3032432 3.6345255
        0.624 0.3025339 3.6475175
        0.625 0.3018529 3.6604613
        0.626 0.3011994 3.6733569
        0.627 0.3005725 3.6862042
        0.628 0.2999715 3.6990032
        0.629 0.2993955 3.7117538
        0.630 0.2988438 3.7244562
        0.631 0.2983157 3.7371102
        0.632 0.2978105 3.7497160
        0.633 0.2973275 3.7622735
        0.634 0.2968661 3.7747828
        0.635 0.2964255 3.7872441
        0.636 0.2960053 3.7996573
        0.637 0.2956047 3.8120225
        0.638 0.2952232 3.8243399
        0.639 0.2948602 3.8366096
        0.640 0.2945152 3.8488316
        0.641 0.2941877 3.8610062
        0.642 0.2938771 3.8731335
        0.643 0.2935829 3.8852135
        0.644 0.2933048 3.8972466
        0.645 0.2930421 3.9092328
        0.646 0.2927945 3.9211724
        0.647 0.2925615 3.9330654
        0.648 0.2923428 3.9449123
        0.649 0.2921378 3.9567130
        0.650 0.2919462 3.9684679
        0.651 0.2917677 3.9801772
        0.652 0.2916018 3.9918411
        0.653 0.2914483 4.0034598
        0.654 0.2913067 4.0150336
        0.655 0.2911767 4.0265628
        0.656 0.2910581 4.0380476
        0.657 0.2909504 4.0494882
        0.658 0.2908535 4.0608849
        0.659 0.2907669 4.0722381
        0.660 0.2906905 4.0835479
        0.661 0.2906240 4.0948147
        0.662 0.2905670 4.1060388
        0.663 0.2905195 4.1172205
        0.664 0.2904810 4.1283600
        0.665 0.2904514 4.1394577
        0.666 0.2904304 4.1505139
        0.667 0.2904178 4.1615288
        0.668 0.2904135 4.1725029
        0.669 0.2904172 4.1834365
        0.670 0.2904287 4.1943297
        0.671 0.2904477 4.2051831
        0.672 0.2904743 4.2159969
        0.673 0.2905080 4.2267715
        0.674 0.2905489 4.2375072
        0.675 0.2905966 4.2482043
        0.676 0.2906511 4.2588632
        0.677 0.2907122 4.2694842
        0.678 0.2907797 4.2800677
        0.679 0.2908536 4.2906141
        0.680 0.2909336 4.3011236
        0.681 0.2910195 4.3115967
        0.682 0.2911114 4.3220336
        0.683 0.2912091 4.3324348
        0.684 0.2913123 4.3428006
        0.685 0.2914211 4.3531313
        0.686 0.2915353 4.3634274
        0.687 0.2916547 4.3736891
        0.688 0.2917794 4.3839169
        0.689 0.2919091 4.3941111
        0.690 0.2920438 4.4042721
        0.691 0.2921834 4.4144002
        0.692 0.2923277 4.4244957
        0.693 0.2924768 4.4345592
        0.694 0.2926304 4.4445908
        0.695 0.2927885 4.4545910
        0.696 0.2929511 4.4645602
        0.697 0.2931180 4.4744986
        0.698 0.2932892 4.4844067
        0.699 0.2934646 4.4942848
        0.700 0.2936442 4.5041333
        0.701 0.2938277 4.5139526
        0.702 0.2940153 4.5237429
        0.703 0.2942067 4.5335046
        0.704 0.2944021 4.5432382
        0.705 0.2946012 4.5529439
        0.706 0.2948040 4.5626221
        0.707 0.2950105 4.5722731
        0.708 0.2952206 4.5818974
        0.709 0.2954343 4.5914952
        0.710 0.2956514 4.6010669
        0.711 0.2958720 4.6106128
        0.712 0.2960961 4.6201333
        0.713 0.2963234 4.6296287
        0.714 0.2965541 4.6390994
        0.715 0.2967880 4.6485456
        0.716 0.2970251 4.6579678
        0.717 0.2972653 4.6673662
        0.718 0.2975087 4.6767412
        0.719 0.2977552 4.6860931
        0.720 0.2980047 4.6954222
        0.721 0.2982572 4.7047288
        0.722 0.2985127 4.7140133
        0.723 0.2987711 4.7232760
        0.724 0.2990323 4.7325171
        0.725 0.2992964 4.7417371
        0.726 0.2995634 4.7509361
        0.727 0.2998331 4.7601146
        0.728 0.3001055 4.7692727
        0.729 0.3003807 4.7784109
        0.730 0.3006585 4.7875294
        0.731 0.3009391 4.7966284
        0.732 0.3012222 4.8057083
        0.733 0.3015079 4.8147694
        0.734 0.3017962 4.8238119
        0.735 0.3020871 4.8328362
        0.736 0.3023804 4.8418424
        0.737 0.3026763 4.8508309
        0.738 0.3029746 4.8598020
        0.739 0.3032753 4.8687558
        0.740 0.3035785 4.8776927
        0.741 0.3038840 4.8866130
        0.742 0.3041920 4.8955168
        0.743 0.3045022 4.9044045
        0.744 0.3048148 4.9132763
        0.745 0.3051297 4.9221324
        0.746 0.3054469 4.9309730
        0.747 0.3057663 4.9397985
        0.748 0.3060880 4.9486090
        0.749 0.3064119 4.9574049
        0.750 0.3067380 4.9661862
        0.751 0.3070663 4.9749532
        0.752 0.3073967 4.9837063
        0.753 0.3077294 4.9924454
        0.754 0.3080641 5.0011710
        0.755 0.3084010 5.0098832
        0.756 0.3087399 5.0185822
        0.757 0.3090810 5.0272682
        0.758 0.3094241 5.0359415
        0.759 0.3097693 5.0446021
        0.760 0.3101165 5.0532504
        0.761 0.3104657 5.0618865
        0.762 0.3108170 5.0705105
        0.763 0.3111703 5.0791228
        0.764 0.3115255 5.0877234
        0.765 0.3118827 5.0963125
        0.766 0.3122419 5.1048903
        0.767 0.3126031 5.1134571
        0.768 0.3129661 5.1220128
        0.769 0.3133311 5.1305578
        0.770 0.3136980 5.1390922
        0.771 0.3140669 5.1476161
        0.772 0.3144376 5.1561297
        0.773 0.3148102 5.1646331
        0.774 0.3151847 5.1731265
        0.775 0.3155610 5.1816100
        0.776 0.3159392 5.1900839
        0.777 0.3163192 5.1985481
        0.778 0.3167011 5.2070029
        0.779 0.3170848 5.2154484
        0.780 0.3174704 5.2238847
        0.781 0.3178577 5.2323119
        0.782 0.3182469 5.2407302
        0.783 0.3186378 5.2491397
        0.784 0.3190306 5.2575405
        0.785 0.3194251 5.2659327
        0.786 0.3198214 5.2743164
        0.787 0.3202195 5.2826918
        0.788 0.3206193 5.2910590
        0.789 0.3210209 5.2994179
        0.790 0.3214242 5.3077689
        0.791 0.3218293 5.3161119
        0.792 0.3222362 5.3244470
        0.793 0.3226447 5.3327744
        0.794 0.3230550 5.3410941
        0.795 0.3234671 5.3494063
        0.796 0.3238808 5.3577109
        0.797 0.3242963 5.3660081
        0.798 0.3247135 5.3742980
        0.799 0.3251324 5.3825806
        0.800 0.3255530 5.3908561
        0.801 0.3259753 5.3991244
        0.802 0.3263993 5.4073857
        0.803 0.3268250 5.4156400
        0.804 0.3272524 5.4238875
        0.805 0.3276814 5.4321280
        0.806 0.3281122 5.4403618
        0.807 0.3285447 5.4485889
        0.808 0.3289788 5.4568093
        0.809 0.3294146 5.4650231
        0.810 0.3298521 5.4732303
        0.811 0.3302912 5.4814311
        0.812 0.3307321 5.4896253
        0.813 0.3311746 5.4978132
        0.814 0.3316188 5.5059946
        0.815 0.3320646 5.5141698
        0.816 0.3325121 5.5223386
        0.817 0.3329613 5.5305012
        0.818 0.3334121 5.5386576
        0.819 0.3338647 5.5468077
        0.820 0.3343188 5.5549518
        0.821 0.3347747 5.5630897
        0.822 0.3352322 5.5712215
        0.823 0.3356914 5.5793473
        0.824 0.3361522 5.5874670
        0.825 0.3366147 5.5955807
        0.826 0.3370789 5.6036884
        0.827 0.3375447 5.6117901
        0.828 0.3380122 5.6198858
        0.829 0.3384813 5.6279757
        0.830 0.3389521 5.6360596
        0.831 0.3394246 5.6441376
        0.832 0.3398988 5.6522096
        0.833 0.3403746 5.6602759
        0.834 0.3408521 5.6683362
        0.835 0.3413313 5.6763906
        0.836 0.3418121 5.6844392
        0.837 0.3422946 5.6924819
        0.838 0.3427788 5.7005188
        0.839 0.3432647 5.7085499
        0.840 0.3437522 5.7165750
        0.841 0.3442414 5.7245944
        0.842 0.3447323 5.7326078
        0.843 0.3452249 5.7406154
        0.844 0.3457192 5.7486172
        0.845 0.3462151 5.7566131
        0.846 0.3467128 5.7646031
        0.847 0.3472121 5.7725873
        0.848 0.3477131 5.7805656
        0.849 0.3482159 5.7885380
        0.850 0.3487203 5.7965045
        0.851 0.3492264 5.8044650
        0.852 0.3497343 5.8124197
        0.853 0.3502438 5.8203684
        0.854 0.3507551 5.8283111
        0.855 0.3512680 5.8362479
        0.856 0.3517827 5.8441787
        0.857 0.3522991 5.8521035
        0.858 0.3528173 5.8600223
        0.859 0.3533371 5.8679351
        0.860 0.3538587 5.8758418
        0.861 0.3543820 5.8837424
        0.862 0.3549071 5.8916369
        0.863 0.3554339 5.8995253
        0.864 0.3559624 5.9074076
        0.865 0.3564927 5.9152837
        0.866 0.3570248 5.9231536
        0.867 0.3575586 5.9310173
        0.868 0.3580941 5.9388748
        0.869 0.3586314 5.9467260
        0.870 0.3591705 5.9545709
        0.871 0.3597114 5.9624094
        0.872 0.3602540 5.9702417
        0.873 0.3607984 5.9780675
        0.874 0.3613446 5.9858870
        0.875 0.3618926 5.9937000
        0.876 0.3624424 6.0015066
        0.877 0.3629940 6.0093066
        0.878 0.3635473 6.0171002
        0.879 0.3641025 6.0248871
        0.880 0.3646595 6.0326675
        0.881 0.3652183 6.0404413
        0.882 0.3657789 6.0482084
        0.883 0.3663414 6.0559688
        0.884 0.3669057 6.0637224
        0.885 0.3674718 6.0714693
        0.886 0.3680397 6.0792095
        0.887 0.3686095 6.0869427
        0.888 0.3691811 6.0946691
        0.889 0.3697546 6.1023887
        0.890 0.3703300 6.1101012
        0.891 0.3709072 6.1178068
        0.892 0.3714863 6.1255054
        0.893 0.3720672 6.1331969
        0.894 0.3726501 6.1408813
        0.895 0.3732348 6.1485586
        0.896 0.3738214 6.1562287
        0.897 0.3744099 6.1638916
        0.898 0.3750003 6.1715472
        0.899 0.3755926 6.1791955
        0.900 0.3761868 6.1868366