Optical constants

Refractive index of C₂H₃N (Acetonitrile)

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: 1.34268
Extinction coefficient k: 0

Permittivity ε₁: 1.80279
Permittivity ε₂: 0

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

Abbe number V_d: 55.547
Chromatic dispersion dn/dλ: -0.0316135 µm⁻¹

Group index n_g: 1.36126
Group velocity dispersion: 60.1224 fs²/mm

Dispersion parameter D: -328 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

# C2H3N (Acetonitrile): Chang et al. 2024: n 0.4–2.0 µm
c2h3n = ls.fetch_refractiveindex("organic", "acetonitrile", "Chang", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c2h3n.range_nm)  # (400, 2000) nm
eps = c2h3n.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_4db2beb6364a/lightsmith"
c2h3n = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c2h3n.source)  # citation and provenance travel with the data

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

# ... load c2h3n as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c2h3n)],
    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_4db2beb6364a/lightsmith?model=drude_lorentz"
c2h3n_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{0.7786 λ^{2}}{λ^{2} - {0.102}^{2}}

Valid from 0.4 to 2.0 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	0.7786
C3	0.102

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

C2H3N (Acetonitrile), Chang et al. 2024: n 0.4–2.0 µm: n and k versus wavelength
λ (µm)	n
0.4	1.353791
0.401617	1.353619
0.40324	1.353449
0.40487	1.35328
0.406506	1.353113
0.408149	1.352947
0.409799	1.352783
0.411455	1.35262
0.413118	1.352459
0.414788	1.352299
0.416465	1.352141
0.418148	1.351984
0.419838	1.351828
0.421535	1.351674
0.423239	1.351521
0.424949	1.35137
0.426667	1.35122
0.428391	1.351071
0.430123	1.350924
0.431861	1.350777
0.433607	1.350633
0.435359	1.350489
0.437119	1.350347
0.438886	1.350206
0.44066	1.350066
0.442441	1.349927
0.444229	1.34979
0.446024	1.349654
0.447827	1.349519
0.449637	1.349385
0.451455	1.349253
0.453279	1.349122
0.455111	1.348991
0.456951	1.348862
0.458798	1.348734
0.460652	1.348608
0.462514	1.348482
0.464383	1.348357
0.46626	1.348234
0.468145	1.348111
0.470037	1.34799
0.471937	1.34787
0.473844	1.34775
0.47576	1.347632
0.477683	1.347515
0.479613	1.347399
0.481552	1.347284
0.483498	1.34717
0.485452	1.347056
0.487414	1.346944
0.489385	1.346833
0.491363	1.346723
0.493349	1.346614
0.495343	1.346505
0.497345	1.346398
0.499355	1.346291
0.501373	1.346186
0.5034	1.346081
0.505434	1.345977
0.507477	1.345875
0.509528	1.345773
0.511588	1.345672
0.513655	1.345572
0.515732	1.345472
0.517816	1.345374
0.519909	1.345276
0.52201	1.345179
0.52412	1.345083
0.526239	1.344988
0.528366	1.344894
0.530501	1.3448
0.532645	1.344708
0.534798	1.344616
0.53696	1.344525
0.53913	1.344434
0.541309	1.344345
0.543497	1.344256
0.545694	1.344168
0.547899	1.344081
0.550114	1.343994
0.552337	1.343908
0.55457	1.343823
0.556811	1.343739
0.559062	1.343655
0.561321	1.343573
0.56359	1.34349
0.565868	1.343409
0.568155	1.343328
0.570452	1.343248
0.572757	1.343169
0.575072	1.34309
0.577397	1.343012
0.57973	1.342934
0.582073	1.342858
0.584426	1.342781
0.586788	1.342706
0.58916	1.342631
0.591541	1.342557
0.593932	1.342483
0.596333	1.34241
0.598743	1.342338
0.601163	1.342266
0.603593	1.342195
0.606032	1.342125
0.608482	1.342055
0.610941	1.341986
0.613411	1.341917
0.61589	1.341849
0.618379	1.341781
0.620879	1.341714
0.623388	1.341648
0.625908	1.341582
0.628438	1.341516
0.630978	1.341452
0.633528	1.341387
0.636088	1.341324
0.638659	1.34126
0.641241	1.341198
0.643833	1.341136
0.646435	1.341074
0.649048	1.341013
0.651671	1.340953
0.654305	1.340893
0.656949	1.340833
0.659605	1.340774
0.662271	1.340715
0.664948	1.340657
0.667635	1.3406
0.670334	1.340543
0.673043	1.340486
0.675763	1.34043
0.678495	1.340374
0.681237	1.340319
0.68399	1.340264
0.686755	1.34021
0.689531	1.340156
0.692318	1.340103
0.695116	1.34005
0.697925	1.339997
0.700746	1.339945
0.703579	1.339894
0.706422	1.339843
0.709278	1.339792
0.712144	1.339741
0.715023	1.339692
0.717913	1.339642
0.720814	1.339593
0.723728	1.339544
0.726653	1.339496
0.72959	1.339448
0.732539	1.339401
0.7355	1.339354
0.738472	1.339307
0.741457	1.339261
0.744454	1.339215
0.747463	1.339169
0.750484	1.339124
0.753517	1.339079
0.756563	1.339035
0.759621	1.338991
0.762691	1.338947
0.765774	1.338904
0.768869	1.338861
0.771977	1.338818
0.775097	1.338776
0.77823	1.338734
0.781375	1.338693
0.784533	1.338651
0.787704	1.33861
0.790888	1.33857
0.794085	1.33853
0.797294	1.33849
0.800517	1.33845
0.803752	1.338411
0.807001	1.338372
0.810263	1.338334
0.813538	1.338296
0.816826	1.338258
0.820127	1.33822
0.823442	1.338183
0.82677	1.338146
0.830112	1.338109
0.833467	1.338073
0.836836	1.338037
0.840218	1.338001
0.843614	1.337965
0.847024	1.33793
0.850447	1.337895
0.853885	1.337861
0.857336	1.337826
0.860801	1.337792
0.86428	1.337758
0.867774	1.337725
0.871281	1.337692
0.874803	1.337659
0.878338	1.337626
0.881888	1.337594
0.885453	1.337562
0.889032	1.33753
0.892625	1.337498
0.896233	1.337467
0.899855	1.337436
0.903492	1.337405
0.907144	1.337374
0.910811	1.337344
0.914492	1.337314
0.918188	1.337284
0.921899	1.337254
0.925626	1.337225
0.929367	1.337196
0.933123	1.337167
0.936895	1.337138
0.940681	1.33711
0.944483	1.337082
0.948301	1.337054
0.952134	1.337026
0.955982	1.336999
0.959846	1.336972
0.963726	1.336945
0.967621	1.336918
0.971532	1.336891
0.975458	1.336865
0.979401	1.336839
0.98336	1.336813
0.987334	1.336787
0.991325	1.336761
0.995332	1.336736
0.999355	1.336711
1.00339	1.336686
1.00745	1.336661
1.01152	1.336637
1.01561	1.336613
1.01971	1.336589
1.02384	1.336565
1.02797	1.336541
1.03213	1.336518
1.0363	1.336494
1.04049	1.336471
1.04469	1.336448
1.04892	1.336425
1.05316	1.336403
1.05741	1.33638
1.06169	1.336358
1.06598	1.336336
1.07029	1.336314
1.07461	1.336293
1.07896	1.336271
1.08332	1.33625
1.0877	1.336229
1.09209	1.336208
1.09651	1.336187
1.10094	1.336167
1.10539	1.336146
1.10986	1.336126
1.11434	1.336106
1.11885	1.336086
1.12337	1.336066
1.12791	1.336046
1.13247	1.336027
1.13704	1.336008
1.14164	1.335988
1.14625	1.335969
1.15089	1.335951
1.15554	1.335932
1.16021	1.335913
1.1649	1.335895
1.16961	1.335877
1.17433	1.335859
1.17908	1.335841
1.18385	1.335823
1.18863	1.335805
1.19344	1.335788
1.19826	1.335771
1.2031	1.335753
1.20797	1.335736
1.21285	1.335719
1.21775	1.335703
1.22267	1.335686
1.22761	1.335669
1.23258	1.335653
1.23756	1.335637
1.24256	1.335621
1.24758	1.335605
1.25262	1.335589
1.25769	1.335573
1.26277	1.335557
1.26787	1.335542
1.273	1.335526
1.27814	1.335511
1.28331	1.335496
1.2885	1.335481
1.2937	1.335466
1.29893	1.335452
1.30418	1.335437
1.30945	1.335422
1.31475	1.335408
1.32006	1.335394
1.3254	1.33538
1.33075	1.335366
1.33613	1.335352
1.34153	1.335338
1.34696	1.335324
1.3524	1.335311
1.35787	1.335297
1.36335	1.335284
1.36886	1.33527
1.3744	1.335257
1.37995	1.335244
1.38553	1.335231
1.39113	1.335218
1.39675	1.335206
1.4024	1.335193
1.40807	1.335181
1.41376	1.335168
1.41947	1.335156
1.42521	1.335144
1.43097	1.335132
1.43675	1.335119
1.44256	1.335108
1.44839	1.335096
1.45424	1.335084
1.46012	1.335072
1.46602	1.335061
1.47195	1.335049
1.4779	1.335038
1.48387	1.335027
1.48987	1.335016
1.49589	1.335004
1.50194	1.334993
1.50801	1.334983
1.5141	1.334972
1.52022	1.334961
1.52637	1.33495
1.53254	1.33494
1.53873	1.334929
1.54495	1.334919
1.55119	1.334909
1.55746	1.334898
1.56376	1.334888
1.57008	1.334878
1.57643	1.334868
1.5828	1.334858
1.58919	1.334849
1.59562	1.334839
1.60207	1.334829
1.60854	1.33482
1.61504	1.33481
1.62157	1.334801
1.62813	1.334791
1.63471	1.334782
1.64131	1.334773
1.64795	1.334764
1.65461	1.334755
1.6613	1.334746
1.66801	1.334737
1.67475	1.334728
1.68152	1.334719
1.68832	1.334711
1.69514	1.334702
1.70199	1.334693
1.70887	1.334685
1.71578	1.334677
1.72271	1.334668
1.72968	1.33466
1.73667	1.334652
1.74369	1.334644
1.75074	1.334635
1.75781	1.334627
1.76492	1.33462
1.77205	1.334612
1.77921	1.334604
1.7864	1.334596
1.79362	1.334588
1.80087	1.334581
1.80815	1.334573
1.81546	1.334566
1.8228	1.334558
1.83017	1.334551
1.83756	1.334544
1.84499	1.334536
1.85245	1.334529
1.85993	1.334522
1.86745	1.334515
1.875	1.334508
1.88258	1.334501
1.89019	1.334494
1.89783	1.334487
1.9055	1.33448
1.9132	1.334473
1.92093	1.334467
1.9287	1.33446
1.93649	1.334454
1.94432	1.334447
1.95218	1.33444
1.96007	1.334434
1.96799	1.334428
1.97594	1.334421
1.98393	1.334415
1.99195	1.334409
2	1.334403

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: —

C₂H₃N (Acetonitrile): all datasets

About C2H3N (Acetonitrile)

Acetonitrile (C₂H₃N): A colorless, volatile liquid, acetonitrile possesses a faintly sweet odor reminiscent of almonds. Widely used as a solvent, it has a high dielectric constant and is particularly effective in the dissolution of ionic compounds. In the laboratory, it is commonly employed as a polar aprotic solvent in organic synthesis and chromatographic processes, including high-performance liquid chromatography (HPLC). Acetonitrile is also utilized in the manufacture of pharmaceuticals, perfumes, and rubber products. Its low UV absorbance makes it valuable in UV-visible spectroscopy applications. The compound is miscible with water and most common organic solvents. Chemical formula: CH₃CN

More about C2H3N (Acetonitrile) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C2H3N - acetonitrile/nk/Chang.yml
ID: ds_4db2beb6364a
API: /v1/datasets/ds_4db2beb6364a

Plot