At one wavelength

Refractive index n: 2.18266
Extinction coefficient k: 0.640274

Permittivity ε₁: 4.35406
Permittivity ε₂: 2.795

Absorption coefficient α: 3591.93 cm⁻¹
Penetration depth δ = λ/(2πk): 5568.04 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.778064 µm⁻¹

Group index n_g: 19.6113
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 0.0553501 eV

ε = (n + ik)², α = 4πk/λ, n_g = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# Kaolinite: Querry 1987: n,k 2.5–200 µm
kaolinite = ls.fetch_refractiveindex("other", "kaolinite", "Querry", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(kaolinite.range_nm)  # (2500, 200000) nm
eps = kaolinite.eps([22400])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_25dc649936cd/lightsmith"
kaolinite = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(kaolinite.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (kaolinite/querry-1987).

# ... load kaolinite as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=kaolinite)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=2500, stop_nm=200000, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Comments and conditions

Pellet.

References

M. R. Querry. Optical constants of minerals and other materials from the millimeter to the ultraviolet, Contractor Report CRDEC-CR-88009 (1987)

Cite

M. R. Querry. Optical constants of minerals and other materials from the millimeter to the ultraviolet, Contractor Report CRDEC-CR-88009 (1987); Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

395 rows as published

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

Kaolinite, Querry 1987: n,k 2.5–200 µm: n and k versus wavelength
λ (µm)	n	k
2.5	1.362	0.0
2.5063	1.361	0.0
2.5126	1.361	0.003
2.5189	1.361	0.001
2.5253	1.361	0.005
2.5316	1.363	0.005
2.5381	1.361	0.003
2.5445	1.363	0.006
2.551	1.361	0.003
2.5575	1.36	0.006
2.5641	1.36	0.005
2.5707	1.359	0.005
2.5773	1.357	0.008
2.584	1.358	0.008
2.5907	1.358	0.01
2.5974	1.358	0.01
2.6042	1.361	0.008
2.611	1.355	0.01
2.6178	1.358	0.01
2.6247	1.358	0.012
2.6316	1.359	0.008
2.6385	1.355	0.007
2.6455	1.353	0.008
2.6525	1.35	0.009
2.6596	1.349	0.01
2.6667	1.349	0.011
2.6738	1.343	0.005
2.681	1.336	0.012
2.6882	1.33	0.008
2.6954	1.311	0.019
2.7027	1.306	0.049
2.71	1.333	0.067
2.7174	1.346	0.059
2.7248	1.346	0.056
2.7322	1.35	0.063
2.7397	1.355	0.061
2.7473	1.353	0.058
2.7548	1.334	0.077
2.7624	1.396	0.123
2.7701	1.424	0.048
2.7778	1.397	0.04
2.7855	1.394	0.035
2.7933	1.386	0.032
2.8011	1.383	0.032
2.809	1.379	0.034
2.8169	1.381	0.035
2.8249	1.379	0.033
2.8329	1.378	0.034
2.8409	1.377	0.032
2.849	1.376	0.034
2.8571	1.376	0.033
2.8653	1.374	0.034
2.8736	1.374	0.035
2.8818	1.374	0.036
2.8902	1.374	0.036
2.8986	1.374	0.036
2.907	1.374	0.037
2.9155	1.374	0.037
2.924	1.374	0.037
2.9326	1.374	0.037
2.9412	1.374	0.037
2.9499	1.374	0.038
2.9586	1.374	0.038
2.9674	1.374	0.038
2.9762	1.374	0.038
2.9851	1.373	0.038
2.994	1.373	0.04
3.003	1.374	0.039
3.012	1.374	0.04
3.0211	1.374	0.04
3.0303	1.374	0.04
3.0395	1.374	0.041
3.0488	1.374	0.041
3.0581	1.374	0.041
3.0675	1.374	0.041
3.0769	1.374	0.042
3.0864	1.374	0.042
3.096	1.374	0.042
3.1056	1.374	0.043
3.1153	1.375	0.043
3.125	1.375	0.043
3.1348	1.375	0.043
3.1447	1.375	0.044
3.1546	1.375	0.044
3.1646	1.375	0.044
3.1746	1.375	0.044
3.1847	1.375	0.044
3.1949	1.375	0.044
3.2051	1.375	0.045
3.2154	1.374	0.045
3.2258	1.375	0.046
3.2362	1.375	0.046
3.2468	1.375	0.046
3.2573	1.375	0.046
3.268	1.375	0.047
3.2787	1.375	0.048
3.2895	1.375	0.048
3.3003	1.375	0.048
3.3113	1.375	0.048
3.3223	1.375	0.049
3.3333	1.376	0.049
3.3445	1.376	0.049
3.3557	1.376	0.049
3.367	1.376	0.049
3.3784	1.376	0.049
3.3898	1.376	0.05
3.4014	1.376	0.05
3.413	1.376	0.05
3.4247	1.376	0.05
3.4364	1.376	0.051
3.4483	1.376	0.051
3.4602	1.377	0.051
3.4722	1.377	0.051
3.4843	1.377	0.052
3.4965	1.377	0.052
3.5088	1.377	0.052
3.5211	1.377	0.052
3.5336	1.377	0.052
3.5461	1.377	0.053
3.5587	1.378	0.053
3.5714	1.378	0.053
3.5842	1.378	0.053
3.5971	1.378	0.053
3.6101	1.378	0.053
3.6232	1.378	0.053
3.6364	1.378	0.053
3.6496	1.378	0.053
3.663	1.378	0.053
3.6765	1.378	0.054
3.69	1.378	0.054
3.7037	1.378	0.054
3.7175	1.377	0.054
3.7313	1.378	0.055
3.7453	1.378	0.055
3.7594	1.378	0.055
3.7736	1.378	0.055
3.7879	1.376	0.055
3.8023	1.378	0.055
3.8168	1.379	0.055
3.8314	1.379	0.055
3.8462	1.378	0.054
3.861	1.378	0.055
3.876	1.378	0.055
3.8911	1.378	0.055
3.9063	1.378	0.055
3.9216	1.378	0.055
3.937	1.378	0.055
3.9526	1.378	0.055
3.9683	1.377	0.055
3.9841	1.377	0.055
4.0	1.377	0.055
4.0161	1.377	0.055
4.0323	1.377	0.055
4.0486	1.377	0.055
4.065	1.376	0.054
4.0816	1.376	0.054
4.0984	1.376	0.055
4.1152	1.375	0.054
4.1322	1.375	0.055
4.1494	1.374	0.054
4.1667	1.374	0.054
4.1841	1.373	0.054
4.2017	1.373	0.055
4.2194	1.373	0.055
4.2373	1.372	0.055
4.2553	1.372	0.055
4.2735	1.372	0.055
4.2918	1.371	0.055
4.3103	1.371	0.055
4.329	1.37	0.055
4.3478	1.37	0.056
4.3668	1.369	0.056
4.386	1.369	0.056
4.4053	1.368	0.056
4.4248	1.368	0.056
4.4444	1.367	0.056
4.4643	1.367	0.057
4.4843	1.366	0.057
4.5045	1.366	0.057
4.5249	1.365	0.057
4.5455	1.365	0.057
4.5662	1.364	0.058
4.5872	1.363	0.058
4.6083	1.363	0.058
4.6296	1.362	0.059
4.6512	1.361	0.059
4.6729	1.361	0.06
4.6948	1.36	0.06
4.717	1.359	0.06
4.7393	1.359	0.061
4.7619	1.358	0.062
4.7847	1.358	0.062
4.8077	1.358	0.062
4.8309	1.357	0.063
4.8544	1.356	0.064
4.878	1.356	0.064
4.902	1.356	0.065
4.9261	1.355	0.065
4.9505	1.355	0.066
4.9751	1.355	0.066
5.0	1.355	0.066
5.0251	1.354	0.066
5.0505	1.354	0.066
5.0761	1.354	0.067
5.102	1.353	0.067
5.1282	1.352	0.067
5.1546	1.352	0.067
5.1813	1.351	0.067
5.2083	1.351	0.068
5.2356	1.35	0.067
5.2632	1.349	0.068
5.291	1.349	0.068
5.3191	1.348	0.068
5.3476	1.347	0.068
5.3763	1.346	0.068
5.4054	1.346	0.068
5.4348	1.345	0.068
5.4645	1.344	0.067
5.4945	1.342	0.067
5.5249	1.341	0.068
5.5556	1.34	0.067
5.5866	1.339	0.068
5.618	1.338	0.068
5.6497	1.336	0.068
5.6818	1.335	0.068
5.7143	1.334	0.068
5.7471	1.332	0.068
5.7803	1.331	0.068
5.814	1.329	0.068
5.848	1.327	0.068
5.8824	1.325	0.068
5.9172	1.323	0.068
5.9524	1.322	0.069
5.968	1.32	0.07
6.0241	1.318	0.07
6.0606	1.317	0.07
6.0976	1.315	0.07
6.135	1.312	0.07
6.1728	1.311	0.07
6.2112	1.309	0.07
6.25	1.306	0.071
6.2893	1.303	0.071
6.3291	1.301	0.071
6.3694	1.299	0.071
6.4103	1.296	0.072
6.4516	1.293	0.072
6.4935	1.291	0.072
6.5359	1.287	0.072
6.5789	1.284	0.072
6.6225	1.281	0.072
6.6667	1.276	0.072
6.7114	1.273	0.072
6.7568	1.269	0.073
6.8027	1.264	0.073
6.8493	1.26	0.074
6.8966	1.256	0.075
6.9444	1.252	0.075
6.993	1.246	0.075
7.0423	1.242	0.075
7.0922	1.235	0.076
7.1429	1.23	0.076
7.1942	1.224	0.077
7.2464	1.218	0.077
7.2993	1.211	0.078
7.3529	1.203	0.078
7.4074	1.195	0.078
7.4627	1.184	0.079
7.5188	1.174	0.083
7.5758	1.166	0.086
7.6336	1.159	0.088
7.6923	1.148	0.088
7.7519	1.137	0.088
7.8125	1.123	0.088
7.874	1.107	0.091
7.9365	1.092	0.093
8.0	1.076	0.096
8.0645	1.057	0.097
8.1301	1.033	0.098
8.1967	1.008	0.106
8.2645	0.982	0.11
8.3333	0.95	0.113
8.4034	0.91	0.12
8.4746	0.863	0.131
8.547	0.806	0.144
8.6207	0.718	0.162
8.6957	0.597	0.242
8.7719	0.512	0.408
8.8496	0.546	0.62
8.9286	0.729	0.702
9.009	0.757	0.566
9.0909	0.567	0.575
9.1743	0.413	0.771
9.2593	0.371	1.052
9.3458	0.429	1.355
9.434	0.572	1.682
9.5238	0.869	2.074
9.6154	1.602	2.354
9.7087	2.302	1.845
9.8039	2.34	1.396
9.901	2.446	1.254
10.0	2.76	0.845
10.101	2.49	0.216
10.2041	2.073	0.117
10.3093	1.833	0.144
10.4167	1.649	0.236
10.5263	1.566	0.377
10.6383	1.55	0.515
10.7527	1.623	0.676
10.8696	1.842	0.762
10.989	2.116	0.633
11.1111	2.174	0.297
11.236	1.994	0.119
11.3636	1.869	0.09
11.4943	1.789	0.073
11.6279	1.723	0.065
11.7647	1.667	0.062
11.9048	1.616	0.061
12.0482	1.565	0.062
12.1951	1.508	0.074
12.3457	1.461	0.113
12.6582	1.472	0.172
12.8205	1.471	0.144
12.987	1.428	0.127
13.1579	1.389	0.142
13.3333	1.373	0.155
13.5135	1.359	0.148
13.6986	1.319	0.127
13.8889	1.248	0.13
14.0845	1.184	0.168
14.2857	1.145	0.222
14.4928	1.128	0.266
14.7059	1.111	0.289
14.9254	1.072	0.307
15.1515	1.023	0.343
15.3846	0.979	0.382
15.625	0.909	0.417
15.873	0.803	0.501
16.129	0.724	0.653
16.3934	0.698	0.834
16.6667	0.718	1.014
16.9492	0.753	1.189
17.2414	0.807	1.404
17.5439	0.936	1.659
17.8571	1.176	1.936
18.1818	1.622	2.19
18.5185	2.363	2.159
18.8679	2.947	1.44
19.2308	2.729	0.661
19.6078	2.222	0.377
20.0	1.837	0.396
20.4082	1.37	0.613
20.8333	1.316	1.379
21.2766	2.158	1.866
21.7391	2.797	0.957
22.2222	2.321	0.566
22.7273	1.928	0.777
23.2558	2.279	1.227
23.8095	2.583	0.883
24.3902	2.598	0.654
25.0	2.527	0.344
25.641	2.278	0.269
26.3158	2.109	0.313
27.027	2.006	0.403
27.7778	1.922	0.447
28.5714	1.754	0.908
29.4118	2.403	0.903
30.303	2.549	0.619
31.25	2.462	0.437
32.2581	2.324	0.316
33.3333	2.21	0.325
34.4828	2.054	0.39
35.7143	2.052	0.799
37.037	2.641	0.689
38.4615	2.609	0.294
40.0	2.423	0.214
41.6667	2.368	0.23
43.4783	2.343	0.206
45.4545	2.301	0.171
47.619	2.212	0.148
50.0	2.077	0.286
52.6316	2.339	0.424
55.5556	2.382	0.279
58.8235	2.368	0.196
62.5	2.315	0.168
66.6667	2.286	0.173
71.4286	2.286	0.197
76.9231	2.304	0.212
83.3333	2.372	0.206
90.9091	2.396	0.111
100.0	2.362	0.059
111.1111	2.32	0.033
125.0	2.286	0.026
142.8571	2.253	0.035
166.6667	2.253	0.073
200.0	2.287	0.067

Optical transmission calculator

Free-standing sample in vacuum, normal incidence

Transmittance T: —
Reflectance R: —

Fresnel reflection calculator

R_p: —
R_s: —
R = (R_p+R_s)/2: —
Phase φ_p: —
Phase φ_s: —
Brewster angle θ_B: —
Critical angle θ_C: —

Plot