Optical constants

Refractive index of C₇F₅N (Pentafluorobenzonitrile)

Chang et al. 2024: n 0.4–2.0 µm

Data: formula 1
Range: 0.4–2 µm
Temperature: 295 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.4416
Extinction coefficient k: 0

Permittivity ε₁: 2.07821
Permittivity ε₂: 0

Absorption coefficient α: 0 cm⁻¹
Penetration depth δ = λ/(2πk): — nm

Abbe number V_d: 29.342
Chromatic dispersion dn/dλ: -0.0766036 µm⁻¹

Group index n_g: 1.48661
Group velocity dispersion: 150.324 fs²/mm

Dispersion parameter D: -820.1 ps/(nm·km)
Photon energy: 2.11001 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

# C7F5N (Pentafluorobenzonitrile): Chang et al. 2024: n 0.4–2.0 µm
c7f5n = ls.fetch_refractiveindex("organic", "pentafluorobenzonitrile", "Chang", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c7f5n.range_nm)  # (400, 2000) nm
eps = c7f5n.eps([633])  # 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_ba9669013b6c/lightsmith"
c7f5n = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c7f5n.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (pentafluorobenzonitrile/chang-2024).

# ... load c7f5n as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c7f5n)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=1000, 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"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_ba9669013b6c/lightsmith?model=drude_lorentz"
c7f5n_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))

A dispersive Drude–Lorentz model for time-domain solvers.

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.

Dispersion formula

Sellmeier (formula 1), λ in µm

n^{2} - 1 = \frac{1.017 λ^{2}}{λ^{2} - {0.14}^{2}}

Valid from 0.4 to 2.0 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	1.017
C3	0.14

Comments and conditions

21.5–22.0 °C.

Conditions

temperature: 295 K

References

H.-J. Chang, N. Munera, C. Lopez-Zelaya, D. Banerjee, G. Beadie, E. W. Van Stryland, D. J. Hagan. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Opt. Mater. Express 14, 1253–1267 (2024)

doi:10.1364/ome.519907 Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry, Optical Materials Express (2024)

Cite

Hao-Jung Chang et al.. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Optical Materials Express, 14, 1253 (2024), doi:10.1364/ome.519907; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 400 wavelengths, the same grid as the API and the library

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

C7F5N (Pentafluorobenzonitrile), Chang et al. 2024: n 0.4–2.0 µm: n and k versus wavelength
λ (µm)	n
0.4	1.469345
0.401617	1.468903
0.40324	1.468465
0.40487	1.468032
0.406506	1.467603
0.408149	1.467179
0.409799	1.466758
0.411455	1.466342
0.413118	1.46593
0.414788	1.465521
0.416465	1.465117
0.418148	1.464717
0.419838	1.464321
0.421535	1.463928
0.423239	1.46354
0.424949	1.463155
0.426667	1.462774
0.428391	1.462397
0.430123	1.462023
0.431861	1.461653
0.433607	1.461286
0.435359	1.460923
0.437119	1.460564
0.438886	1.460208
0.44066	1.459855
0.442441	1.459506
0.444229	1.45916
0.446024	1.458818
0.447827	1.458478
0.449637	1.458142
0.451455	1.457809
0.453279	1.45748
0.455111	1.457153
0.456951	1.45683
0.458798	1.456509
0.460652	1.456192
0.462514	1.455878
0.464383	1.455566
0.46626	1.455258
0.468145	1.454952
0.470037	1.45465
0.471937	1.45435
0.473844	1.454053
0.47576	1.453758
0.477683	1.453467
0.479613	1.453178
0.481552	1.452892
0.483498	1.452609
0.485452	1.452328
0.487414	1.45205
0.489385	1.451774
0.491363	1.451501
0.493349	1.45123
0.495343	1.450962
0.497345	1.450697
0.499355	1.450434
0.501373	1.450173
0.5034	1.449915
0.505434	1.449659
0.507477	1.449406
0.509528	1.449154
0.511588	1.448905
0.513655	1.448659
0.515732	1.448415
0.517816	1.448172
0.519909	1.447932
0.52201	1.447695
0.52412	1.447459
0.526239	1.447226
0.528366	1.446995
0.530501	1.446765
0.532645	1.446538
0.534798	1.446313
0.53696	1.44609
0.53913	1.445869
0.541309	1.44565
0.543497	1.445433
0.545694	1.445218
0.547899	1.445005
0.550114	1.444794
0.552337	1.444584
0.55457	1.444377
0.556811	1.444172
0.559062	1.443968
0.561321	1.443766
0.56359	1.443566
0.565868	1.443368
0.568155	1.443171
0.570452	1.442976
0.572757	1.442783
0.575072	1.442592
0.577397	1.442402
0.57973	1.442214
0.582073	1.442028
0.584426	1.441844
0.586788	1.441661
0.58916	1.441479
0.591541	1.4413
0.593932	1.441122
0.596333	1.440945
0.598743	1.44077
0.601163	1.440597
0.603593	1.440425
0.606032	1.440254
0.608482	1.440086
0.610941	1.439918
0.613411	1.439752
0.61589	1.439588
0.618379	1.439425
0.620879	1.439263
0.623388	1.439103
0.625908	1.438944
0.628438	1.438787
0.630978	1.438631
0.633528	1.438476
0.636088	1.438323
0.638659	1.438171
0.641241	1.438021
0.643833	1.437871
0.646435	1.437723
0.649048	1.437577
0.651671	1.437431
0.654305	1.437287
0.656949	1.437144
0.659605	1.437003
0.662271	1.436862
0.664948	1.436723
0.667635	1.436585
0.670334	1.436448
0.673043	1.436313
0.675763	1.436178
0.678495	1.436045
0.681237	1.435913
0.68399	1.435782
0.686755	1.435652
0.689531	1.435523
0.692318	1.435396
0.695116	1.435269
0.697925	1.435144
0.700746	1.43502
0.703579	1.434896
0.706422	1.434774
0.709278	1.434653
0.712144	1.434533
0.715023	1.434414
0.717913	1.434296
0.720814	1.434179
0.723728	1.434063
0.726653	1.433948
0.72959	1.433834
0.732539	1.433721
0.7355	1.433608
0.738472	1.433497
0.741457	1.433387
0.744454	1.433278
0.747463	1.43317
0.750484	1.433062
0.753517	1.432956
0.756563	1.43285
0.759621	1.432745
0.762691	1.432642
0.765774	1.432539
0.768869	1.432437
0.771977	1.432336
0.775097	1.432235
0.77823	1.432136
0.781375	1.432037
0.784533	1.43194
0.787704	1.431843
0.790888	1.431747
0.794085	1.431651
0.797294	1.431557
0.800517	1.431463
0.803752	1.43137
0.807001	1.431278
0.810263	1.431187
0.813538	1.431096
0.816826	1.431007
0.820127	1.430918
0.823442	1.430829
0.82677	1.430742
0.830112	1.430655
0.833467	1.430569
0.836836	1.430484
0.840218	1.430399
0.843614	1.430315
0.847024	1.430232
0.850447	1.43015
0.853885	1.430068
0.857336	1.429987
0.860801	1.429906
0.86428	1.429827
0.867774	1.429748
0.871281	1.429669
0.874803	1.429591
0.878338	1.429514
0.881888	1.429438
0.885453	1.429362
0.889032	1.429287
0.892625	1.429212
0.896233	1.429139
0.899855	1.429065
0.903492	1.428993
0.907144	1.428921
0.910811	1.428849
0.914492	1.428778
0.918188	1.428708
0.921899	1.428638
0.925626	1.428569
0.929367	1.428501
0.933123	1.428433
0.936895	1.428365
0.940681	1.428299
0.944483	1.428232
0.948301	1.428167
0.952134	1.428101
0.955982	1.428037
0.959846	1.427973
0.963726	1.427909
0.967621	1.427846
0.971532	1.427784
0.975458	1.427722
0.979401	1.42766
0.98336	1.427599
0.987334	1.427539
0.991325	1.427479
0.995332	1.42742
0.999355	1.427361
1.00339	1.427302
1.00745	1.427244
1.01152	1.427187
1.01561	1.42713
1.01971	1.427073
1.02384	1.427017
1.02797	1.426962
1.03213	1.426907
1.0363	1.426852
1.04049	1.426798
1.04469	1.426744
1.04892	1.426691
1.05316	1.426638
1.05741	1.426585
1.06169	1.426533
1.06598	1.426482
1.07029	1.426431
1.07461	1.42638
1.07896	1.426329
1.08332	1.42628
1.0877	1.42623
1.09209	1.426181
1.09651	1.426132
1.10094	1.426084
1.10539	1.426036
1.10986	1.425989
1.11434	1.425942
1.11885	1.425895
1.12337	1.425849
1.12791	1.425803
1.13247	1.425757
1.13704	1.425712
1.14164	1.425667
1.14625	1.425623
1.15089	1.425579
1.15554	1.425535
1.16021	1.425492
1.1649	1.425449
1.16961	1.425406
1.17433	1.425364
1.17908	1.425322
1.18385	1.425281
1.18863	1.425239
1.19344	1.425198
1.19826	1.425158
1.2031	1.425118
1.20797	1.425078
1.21285	1.425038
1.21775	1.424999
1.22267	1.42496
1.22761	1.424921
1.23258	1.424883
1.23756	1.424845
1.24256	1.424808
1.24758	1.42477
1.25262	1.424733
1.25769	1.424696
1.26277	1.42466
1.26787	1.424624
1.273	1.424588
1.27814	1.424552
1.28331	1.424517
1.2885	1.424482
1.2937	1.424448
1.29893	1.424413
1.30418	1.424379
1.30945	1.424345
1.31475	1.424312
1.32006	1.424278
1.3254	1.424245
1.33075	1.424213
1.33613	1.42418
1.34153	1.424148
1.34696	1.424116
1.3524	1.424084
1.35787	1.424053
1.36335	1.424022
1.36886	1.423991
1.3744	1.42396
1.37995	1.42393
1.38553	1.4239
1.39113	1.42387
1.39675	1.42384
1.4024	1.423811
1.40807	1.423782
1.41376	1.423753
1.41947	1.423724
1.42521	1.423696
1.43097	1.423667
1.43675	1.423639
1.44256	1.423612
1.44839	1.423584
1.45424	1.423557
1.46012	1.42353
1.46602	1.423503
1.47195	1.423476
1.4779	1.42345
1.48387	1.423423
1.48987	1.423397
1.49589	1.423372
1.50194	1.423346
1.50801	1.423321
1.5141	1.423295
1.52022	1.42327
1.52637	1.423246
1.53254	1.423221
1.53873	1.423197
1.54495	1.423173
1.55119	1.423149
1.55746	1.423125
1.56376	1.423101
1.57008	1.423078
1.57643	1.423055
1.5828	1.423032
1.58919	1.423009
1.59562	1.422986
1.60207	1.422964
1.60854	1.422942
1.61504	1.422919
1.62157	1.422898
1.62813	1.422876
1.63471	1.422854
1.64131	1.422833
1.64795	1.422812
1.65461	1.422791
1.6613	1.42277
1.66801	1.422749
1.67475	1.422729
1.68152	1.422708
1.68832	1.422688
1.69514	1.422668
1.70199	1.422648
1.70887	1.422629
1.71578	1.422609
1.72271	1.42259
1.72968	1.42257
1.73667	1.422551
1.74369	1.422532
1.75074	1.422514
1.75781	1.422495
1.76492	1.422477
1.77205	1.422458
1.77921	1.42244
1.7864	1.422422
1.79362	1.422404
1.80087	1.422387
1.80815	1.422369
1.81546	1.422352
1.8228	1.422334
1.83017	1.422317
1.83756	1.4223
1.84499	1.422283
1.85245	1.422267
1.85993	1.42225
1.86745	1.422233
1.875	1.422217
1.88258	1.422201
1.89019	1.422185
1.89783	1.422169
1.9055	1.422153
1.9132	1.422137
1.92093	1.422122
1.9287	1.422107
1.93649	1.422091
1.94432	1.422076
1.95218	1.422061
1.96007	1.422046
1.96799	1.422031
1.97594	1.422017
1.98393	1.422002
1.99195	1.421988
2	1.421973

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: —

C₇F₅N (Pentafluorobenzonitrile): all datasets

Chang et al. 2024: n 0.4–2.0 µm n 0.4–2 µm default

About C7F5N (Pentafluorobenzonitrile)

Pentafluorobenzonitrile (C₆F₅CN) is a specialized chemical compound characterized by a benzene ring where five hydrogen atoms are replaced by fluorine atoms, with a nitrile group (-CN) attached. It appears as a colorless, crystalline solid with a distinctive, sharp odor. This compound is primarily used in the synthesis of various pharmaceuticals, agrochemicals, and materials due to its unique reactivity and the ability to introduce fluorine into other molecules. Pentafluorobenzonitrile is also valued for its applications in liquid crystal and fluoropolymer production. Optically, the strong electron-withdrawing effects of the fluorine atoms and the nitrile group can impart useful refractive properties to materials incorporating this compound. Handling pentafluorobenzonitrile requires precautions due to its potential toxicity and environmental impact.

More about C7F5N (Pentafluorobenzonitrile) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C7F5N - pentafluorobenzonitrile/nk/Chang.yml
ID: ds_ba9669013b6c
API: /v1/datasets/ds_ba9669013b6c

Plot