Optical constants

Refractive index of SrF₂ (Strontium fluoride)

Bosomworth 1967: n,k 62.5–1000 µm; 300 K

Data: formula 4 + tabulated k
Range: 62.5–1000 µm
Temperature: 300 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.51898
Extinction coefficient k: 0.0199

Permittivity ε₁: 6.34487
Permittivity ε₂: 0.100255

Absorption coefficient α: 10.0028 cm⁻¹
Penetration depth δ = λ/(2πk): 1.99943e+06 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.000238789 µm⁻¹

Group index n_g: 2.57868
Group velocity dispersion: 82377.7 fs²/mm

Dispersion parameter D: -2.48273 ps/(nm·km)
Photon energy: 0.00495937 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

# SrF2 (Strontium fluoride): Bosomworth 1967: n,k 62.5–1000 µm; 300 K
srf2 = ls.fetch_refractiveindex("main", "SrF2", "Bosomworth-300K", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(srf2.range_nm)  # (62500, 1e+06) nm
eps = srf2.eps([250000])  # 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_e45f0e0f202d/lightsmith"
srf2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(srf2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (srf2/bosomworth-1967-300k).

# ... load srf2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=srf2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=62500, stop_nm=1e+06, 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.

Dispersion formula

RefractiveIndex.INFO (formula 4), λ in µm

n^{2} = 0.0 + \frac{6.2 λ^{2.0}}{λ^{2} - {46.083}^{2.0}} - \frac{4395.9 λ^{0.0}}{λ^{2} - {46.083}^{2.0}}

Valid from 62.5 to 1000.0 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	6.2
C3	2.0
C4	46.083
C5	2.0
C6	-4395.9
C7	0.0
C8	46.083
C9	2.0

Comments and conditions

300 K

Conditions

temperature: 300 K

References

D. R. Bosomworth. Far-infrared optical properties of CaF₂, SrF₂, BaF₂, and CdF₂. Phys. Rev., 157, 709 (1967)

doi:10.1103/physrev.157.709 Far-Infrared Optical Properties of Ca<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Sr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Ba<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, and Cd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Physical Review (1967)

Cite

D. R. Bosomworth. Far-Infrared Optical Properties of Ca<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Sr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Ba<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, and Cd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>. Physical Review, 157, 709-715 (1967), doi:10.1103/physrev.157.709; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 549 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

SrF2 (Strontium fluoride), Bosomworth 1967: n,k 62.5–1000 µm; 300 K: n and k versus wavelength
λ (µm)	n	k
62.5	3.334688	0.0796
62.893	3.314783	0.0738
62.9358	3.312665	0.07341273
63.291	3.295457	0.0702
63.3747	3.291495	0.06947334
63.694	3.276687	0.0667
63.8166	3.271131	0.0658608
64.103	3.258413	0.0639
64.2616	3.251527	0.06324725
64.516	3.240703	0.0622
64.7097	3.232643	0.06210755
64.935	3.223455	0.062
65.1609	3.214441	0.06263934
65.359	3.206695	0.0632
65.6153	3.196885	0.06391518
65.789	3.190368	0.0644
66.0728	3.179943	0.06479056
66.225	3.174463	0.065
66.5335	3.163583	0.06479059
66.667	3.15897	0.0647
66.9975	3.147778	0.05752853
67.114	3.143909	0.055
67.4647	3.132499	0.05167881
67.568	3.129202	0.0507
67.9351	3.117723	0.04854065
68.027	3.114904	0.048
68.4088	3.103425	0.04644329
68.493	3.100942	0.0461
68.8858	3.089584	0.04560171
68.966	3.08731	0.0455
69.3662	3.076179	0.04524885
69.444	3.074055	0.0452
69.8499	3.063191	0.04494947
69.93	3.061086	0.0449
70.3369	3.0506	0.04465238
70.423	3.048424	0.0446
70.8274	3.038391	0.04411376
70.922	3.036088	0.044
71.3213	3.026547	0.04329124
71.429	3.024021	0.0431
71.8186	3.015053	0.04226461
71.942	3.012265	0.042
72.3194	3.003894	0.04098784
72.464	3.000746	0.0406
72.8237	2.993056	0.03951213
72.993	2.989504	0.039
73.3315	2.982527	0.03824221
73.529	2.978532	0.0378
73.8428	2.972295	0.03728176
74.074	2.967785	0.0369
74.3577	2.962347	0.03643823
74.627	2.957282	0.036
74.8762	2.952673	0.03564459
75.188	2.947016	0.0352
75.3983	2.943263	0.03494168
75.758	2.936966	0.0345
75.9241	2.934107	0.03432758
76.336	2.927147	0.0339
76.4535	2.925194	0.03379989
76.923	2.917538	0.0334
76.9866	2.916517	0.03335729
77.519	2.908136	0.033
77.5235	2.908067	0.03299779
78.064	2.899835	0.03273018
78.125	2.898924	0.0327
78.6084	2.891815	0.0323856
78.74	2.889914	0.0323
79.1565	2.883998	0.03210007
79.365	2.88109	0.032
79.7085	2.876377	0.03189181
80	2.87245	0.0318
80.2643	2.868947	0.03167707
80.645	2.863992	0.0315
80.824	2.8617	0.03144543
81.301	2.855702	0.0313
81.3876	2.85463	0.031274
81.9551	2.847732	0.03110358
81.967	2.84759	0.0311
82.5266	2.841	0.03093493
82.645	2.839631	0.0309
83.102	2.834429	0.03076714
83.333	2.831848	0.0307
83.6815	2.828013	0.03060057
84.034	2.824205	0.0305
84.265	2.821748	0.03043511
84.746	2.816725	0.0303
84.8526	2.815629	0.03028528
85.4443	2.809651	0.03020355
85.47	2.809395	0.0302
86.0401	2.80381	0.03004529
86.207	2.802205	0.03
86.6401	2.798102	0.02988452
86.957	2.795154	0.0298
87.2442	2.792523	0.02972462
87.719	2.788253	0.0296
87.8526	2.787069	0.02958281
88.4652	2.781737	0.02950397
88.496	2.781472	0.0295
89.082	2.776522	0.02935164
89.286	2.774831	0.0293
89.7032	2.771422	0.02924811
90.09	2.76832	0.0292
90.3287	2.766433	0.02917085
90.909	2.761931	0.0291
90.9586	2.761552	0.02909406
91.5928	2.756776	0.02901801
91.743	2.755665	0.029
92.2315	2.752102	0.02894253
92.593	2.749515	0.0289
92.8746	2.747528	0.02886744
93.458	2.743489	0.0288
93.5223	2.74305	0.0288
94.1744	2.738666	0.0288
94.34	2.737572	0.0288
94.8311	2.734373	0.0288
95.238	2.731772	0.0288
95.4923	2.730169	0.0288
96.154	2.726078	0.0288
96.1582	2.726052	0.0288
96.8287	2.722019	0.0288
97.087	2.720495	0.0288
97.5039	2.718069	0.02884379
98.039	2.715014	0.0289
98.1838	2.714198	0.0289
98.8685	2.710405	0.0289
99.01	2.709634	0.0289
99.5579	2.706688	0.02895534
100	2.704357	0.029
100.252	2.703045	0.029
100.951	2.699475	0.029
101.01	2.699179	0.029
101.655	2.695974	0.02906263
102.04	2.6941	0.0291
102.364	2.692543	0.02913085
103.078	2.689178	0.02919883
103.09	2.689121	0.0292
103.796	2.685879	0.02926542
104.17	2.684198	0.0293
104.52	2.682643	0.02933213
105.249	2.67947	0.029399
105.26	2.679423	0.0294
105.983	2.676357	0.02952911
106.38	2.674707	0.0296
106.722	2.673303	0.02962974
107.466	2.670308	0.02969445
107.53	2.670054	0.0297
108.216	2.667369	0.02981719
108.7	2.665509	0.0299
108.97	2.664485	0.0299227
109.73	2.661655	0.02998656
109.89	2.661068	0.03
110.495	2.658878	0.03009921
111.11	2.656697	0.0302
111.266	2.656152	0.0302249
112.042	2.653476	0.03034904
112.36	2.652398	0.0304
112.823	2.65085	0.03047231
113.61	2.648272	0.03059523
113.64	2.648173	0.0306
114.402	2.645741	0.03071719
114.94	2.644057	0.0308
115.199	2.643256	0.03083872
116.003	2.640816	0.03095862
116.28	2.639988	0.031
116.812	2.63842	0.03107761
117.626	2.636066	0.03119652
117.65	2.635998	0.0312
118.446	2.633755	0.03131377
119.05	2.632091	0.0314
119.272	2.631486	0.03141554
120.104	2.629256	0.03147371
120.48	2.628266	0.0315
120.941	2.627066	0.03156279
121.785	2.624914	0.03167752
121.95	2.624499	0.0317
122.634	2.622801	0.0317453
123.46	2.620794	0.0318
123.489	2.620724	0.03180189
124.35	2.618684	0.03185781
125	2.617177	0.0319
125.217	2.616679	0.03191376
126.09	2.614709	0.03196902
126.58	2.613625	0.032
126.97	2.612773	0.03202391
127.855	2.61087	0.03207823
128.21	2.61012	0.0321
128.747	2.609	0.03213233
129.644	2.607162	0.03218641
129.87	2.606707	0.0322
130.548	2.605356	0.03223967
131.459	2.60358	0.03229291
131.58	2.603346	0.0323
132.375	2.601834	0.03234545
133.298	2.600118	0.0323982
133.33	2.60006	0.0324
134.228	2.598431	0.03244961
135.14	2.596814	0.0325
135.164	2.596772	0.03250129
136.106	2.595141	0.03255224
136.99	2.593646	0.0326
137.055	2.593537	0.03260345
138.011	2.59196	0.03265375
138.89	2.590542	0.0327
138.974	2.590409	0.03270426
139.943	2.588884	0.0327537
140.85	2.587489	0.0328
140.918	2.587385	0.0328
141.901	2.58591	0.0328
142.86	2.584503	0.0328
142.891	2.584459	0.0328
143.887	2.583032	0.0328
144.89	2.581629	0.0328
144.93	2.581574	0.0328
145.901	2.580248	0.0328
146.918	2.57889	0.0328
147.06	2.578703	0.0328
147.942	2.577554	0.03275971
148.974	2.57624	0.0327126
149.25	2.575894	0.0327
150.013	2.574947	0.0327
151.059	2.573675	0.0327
151.52	2.573124	0.0327
152.112	2.572424	0.03267458
153.173	2.571192	0.03262906
153.85	2.570421	0.0326
154.241	2.569981	0.03258371
155.317	2.568789	0.03253889
156.25	2.567776	0.0325
156.4	2.567616	0.03248794
157.49	2.566461	0.03239999
158.588	2.565325	0.03231143
158.73	2.565181	0.0323
159.694	2.564207	0.03226234
160.808	2.563107	0.03221884
161.29	2.562638	0.0322
161.929	2.562024	0.03212738
163.058	2.560959	0.03199907
163.93	2.560152	0.0319
164.195	2.55991	0.03186129
165.34	2.558877	0.03169414
166.493	2.557861	0.03152583
166.67	2.557707	0.0315
167.654	2.556861	0.03132553
168.823	2.555877	0.03111825
169.49	2.555325	0.031
170	2.554907	0.03091262
171.186	2.553953	0.03070964
172.379	2.553014	0.03050524
172.41	2.55299	0.0305
173.581	2.55209	0.03026804
174.792	2.55118	0.03002836
175.44	2.5507	0.0299
176.011	2.550283	0.02977239
177.238	2.549401	0.0294979
178.474	2.548533	0.02922151
178.57	2.548466	0.0292
179.718	2.547677	0.02895267
180.972	2.546835	0.02868275
181.82	2.546276	0.0285
182.233	2.546006	0.02842639
183.504	2.54519	0.02820015
184.784	2.544386	0.02797233
185.19	2.544135	0.0279
186.072	2.543595	0.02772304
187.37	2.542815	0.0274628
188.676	2.542048	0.02720075
188.68	2.542045	0.0272
189.992	2.541292	0.02694701
191.317	2.540548	0.02669154
192.31	2.54	0.0265
192.651	2.539814	0.02643672
193.994	2.539093	0.02618729
195.347	2.538382	0.02593612
196.08	2.538003	0.0258
196.709	2.537682	0.02560743
198.081	2.536992	0.02518753
199.462	2.536313	0.02476471
200	2.536052	0.0246
200.853	2.535644	0.02443278
202.253	2.534985	0.02415816
203.664	2.534336	0.02388163
204.08	2.534147	0.0238
205.084	2.533697	0.02363466
206.514	2.533067	0.02339912
207.954	2.532447	0.02316194
208.33	2.532287	0.0231
209.404	2.531836	0.02300324
210.864	2.531235	0.0228717
212.335	2.530642	0.02273923
212.77	2.530469	0.0227
213.815	2.530058	0.02258689
215.306	2.529483	0.02242553
216.807	2.528916	0.02226305
217.39	2.5287	0.0222
218.319	2.528358	0.0221038
219.842	2.527808	0.02194621
221.375	2.527266	0.02178752
222.22	2.526973	0.0217
222.918	2.526733	0.0216447
224.473	2.526207	0.02152157
226.038	2.525689	0.02139759
227.27	2.525289	0.0213
227.614	2.525179	0.02127398
229.201	2.524676	0.02115397
230.799	2.524181	0.02103312
232.409	2.523693	0.02091143
232.56	2.523647	0.0209
234.029	2.523212	0.02082043
235.661	2.522738	0.02073206
237.305	2.522271	0.02064307
238.1	2.522049	0.0206
238.959	2.521811	0.02054073
240.626	2.521358	0.02042582
242.304	2.520911	0.0203101
243.9	2.520495	0.0202
243.993	2.520471	0.02019542
245.694	2.520038	0.02011175
247.408	2.51961	0.02002749
249.133	2.519189	0.01994264
250	2.518981	0.0199
250.87	2.518775	0.0198457
252.619	2.518366	0.01973654
254.381	2.517963	0.01962662
256.155	2.517566	0.01951593
256.41	2.51751	0.0195
257.941	2.517175	0.01943196
259.74	2.51679	0.01935202
261.551	2.51641	0.01927152
263.16	2.516079	0.0192
263.375	2.516035	0.01918793
265.211	2.515666	0.01908461
267.06	2.515303	0.01898057
268.923	2.514945	0.0188758
270.27	2.51469	0.0188
270.798	2.514591	0.01877891
272.686	2.514243	0.01870348
274.588	2.513901	0.01862753
276.502	2.513563	0.01855104
277.78	2.513341	0.0185
278.43	2.513229	0.01846719
280.372	2.512901	0.01836926
282.327	2.512578	0.01827065
284.296	2.512259	0.01817134
285.71	2.512034	0.0181
286.278	2.511944	0.01807298
288.274	2.511635	0.01797804
290.284	2.511329	0.01788243
292.309	2.511029	0.01778616
294.12	2.510765	0.0177
294.347	2.510732	0.01768982
296.399	2.51044	0.01759767
298.466	2.510152	0.01750489
300.547	2.509868	0.01741145
302.643	2.509588	0.01731737
303.03	2.509537	0.0173
304.753	2.509312	0.01722721
306.878	2.50904	0.01713745
309.018	2.508772	0.01704706
311.173	2.508508	0.01695604
312.5	2.508348	0.0169
313.343	2.508247	0.01685819
315.528	2.507991	0.01674981
317.728	2.507738	0.01664067
319.944	2.507488	0.01653077
322.175	2.507242	0.01642011
322.58	2.507198	0.0164
324.421	2.507	0.01631436
326.683	2.506761	0.01620915
328.961	2.506526	0.01610319
331.255	2.506294	0.0159965
333.33	2.506088	0.0159
333.565	2.506065	0.01589182
335.891	2.505839	0.01581092
338.233	2.505617	0.01572945
340.592	2.505398	0.01564742
342.967	2.505182	0.01556481
344.83	2.505015	0.0155
345.358	2.504969	0.01547425
347.766	2.504759	0.01535688
350.191	2.504552	0.01523868
352.633	2.504348	0.01511966
355.092	2.504147	0.01499981
357.14	2.503982	0.0149
357.568	2.503948	0.01488381
360.062	2.503753	0.01478958
362.572	2.50356	0.0146947
365.101	2.50337	0.01459915
367.646	2.503183	0.01450293
370.21	2.502998	0.01440604
370.37	2.502987	0.0144
372.792	2.502816	0.01434902
375.391	2.502637	0.01429429
378.009	2.50246	0.01423919
380.645	2.502286	0.01418369
383.299	2.502114	0.01412781
384.62	2.50203	0.0141
385.972	2.501944	0.01408242
388.663	2.501777	0.01404743
391.373	2.501612	0.01401218
394.102	2.50145	0.01397669
396.85	2.50129	0.01394096
399.618	2.501132	0.01390497
400	2.501111	0.0139
402.404	2.500977	0.01382789
405.21	2.500823	0.01374373
408.036	2.500672	0.01365898
410.881	2.500523	0.01357364
413.746	2.500376	0.0134877
416.631	2.500231	0.01340117
416.67	2.500229	0.0134
419.536	2.500088	0.01327339
422.462	2.499947	0.01314416
425.407	2.499808	0.01301403
428.374	2.499671	0.01288299
431.361	2.499536	0.01275104
434.369	2.499403	0.01261816
434.78	2.499385	0.0126
437.398	2.499272	0.01252056
440.448	2.499142	0.01242799
443.519	2.499015	0.01233478
446.612	2.498889	0.01224092
449.726	2.498765	0.01214641
452.862	2.498642	0.01205123
454.55	2.498578	0.012
456.02	2.498522	0.01195246
459.2	2.498403	0.0118496
462.402	2.498286	0.01174602
465.626	2.49817	0.01164172
468.873	2.498056	0.0115367
472.142	2.497944	0.01143094
475.434	2.497833	0.01132444
476.19	2.497808	0.0113
478.75	2.497724	0.0112355
482.088	2.497616	0.01115137
485.45	2.49751	0.01106666
488.835	2.497405	0.01098136
492.243	2.497302	0.01089546
495.676	2.4972	0.01080897
499.132	2.4971	0.01072187
500	2.497075	0.0107
502.613	2.497001	0.01066029
506.117	2.496903	0.01060703
509.647	2.496807	0.0105534
513.2	2.496712	0.01049939
516.779	2.496619	0.010445
520.382	2.496526	0.01039024
524.011	2.496436	0.01033509
526.32	2.496379	0.0103
527.665	2.496346	0.01027884
531.344	2.496257	0.01022096
535.05	2.49617	0.01016267
538.78	2.496084	0.01010397
542.537	2.496	0.01004487
546.321	2.495916	0.009985354
550.13	2.495834	0.009925423
553.966	2.495752	0.009865075
555.56	2.495719	0.00984
557.829	2.495672	0.009811534
561.719	2.495593	0.009762733
565.636	2.495515	0.009713592
569.58	2.495438	0.009664109
573.552	2.495363	0.00961428
577.551	2.495288	0.009564104
581.578	2.495214	0.009513578
585.634	2.495142	0.0094627
588.24	2.495096	0.00943
589.717	2.49507	0.009414328
593.829	2.495	0.009370701
597.97	2.49493	0.009326769
602.14	2.494861	0.009282532
606.339	2.494794	0.009237986
610.567	2.494727	0.009193129
614.824	2.494661	0.00914796
619.111	2.494596	0.009102475
623.428	2.494532	0.009056674
625	2.494509	0.00904
627.776	2.494469	0.009014689
632.153	2.494407	0.008974769
636.561	2.494345	0.008934571
641	2.494285	0.008894093
645.47	2.494225	0.008853332
649.97	2.494166	0.008812287
654.503	2.494108	0.008770956
659.067	2.494051	0.008729337
663.662	2.493995	0.008687428
666.67	2.493958	0.00866
668.29	2.493939	0.008647072
672.95	2.493884	0.008609886
677.643	2.49383	0.00857244
682.368	2.493777	0.008534734
687.126	2.493724	0.008496764
691.917	2.493672	0.00845853
696.742	2.493621	0.008420029
701.601	2.493571	0.00838126
706.493	2.493521	0.00834222
711.419	2.493472	0.008302908
714.29	2.493444	0.00828
716.38	2.493424	0.008268207
721.375	2.493376	0.008240021
726.406	2.493329	0.008211638
731.471	2.493282	0.008183057
736.571	2.493237	0.008154277
741.708	2.493192	0.008125296
746.879	2.493147	0.008096113
752.088	2.493103	0.008066727
757.332	2.49306	0.008037136
762.613	2.493017	0.008007338
767.93	2.492975	0.007977333
769.23	2.492965	0.00797
773.285	2.492934	0.007949123
778.677	2.492893	0.007921363
784.107	2.492853	0.007893409
789.575	2.492813	0.007865261
795.081	2.492774	0.007836916
800.625	2.492735	0.007808374
806.207	2.492697	0.007779632
811.829	2.492659	0.007750691
817.49	2.492622	0.007721547
823.191	2.492586	0.0076922
828.931	2.49255	0.007662649
833.33	2.492523	0.00764
834.711	2.492514	0.007633985
840.531	2.492479	0.007608632
846.392	2.492444	0.007583102
852.294	2.49241	0.007557394
858.237	2.492377	0.007531507
864.222	2.492344	0.007505439
870.248	2.492311	0.00747919
876.316	2.492279	0.007452757
882.427	2.492247	0.00742614
888.58	2.492215	0.007399338
894.776	2.492185	0.007372348
901.016	2.492154	0.007345171
907.298	2.492124	0.007317804
909.09	2.492116	0.00731
913.625	2.492094	0.007294535
919.996	2.492065	0.007272811
926.411	2.492036	0.007250936
932.871	2.492008	0.007228908
939.376	2.49198	0.007206726
945.926	2.491952	0.00718439
952.522	2.491925	0.007161898
959.164	2.491898	0.007139249
965.852	2.491871	0.007116442
972.587	2.491845	0.007093476
979.369	2.491819	0.00707035
986.198	2.491794	0.007047063
993.075	2.491769	0.007023613
1000	2.491744	0.007

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: —

SrF₂ (Strontium fluoride): all datasets

About SrF2 (Strontium fluoride)

Strontium fluoride (SrF₂) is an inorganic compound that appears as a white crystalline solid at room temperature. With a high melting point and good thermal stability, it is often used in optical applications due to its notable transparency to ultraviolet and visible wavelengths. Its optical clarity has led to its use in the manufacture of windows and lenses, especially in specialized optical systems. Additionally, SrF₂ is employed as a thin film in the production of optical coatings, thanks to its low refractive index. Moreover, the compound is explored for potential use in fluoride ion batteries due to its high ionic conductivity. In nature, strontium fluoride occurs as the mineral strontianite, though most commercial preparations are synthesized through chemical reactions.

More about SrF2 (Strontium fluoride) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/SrF2/nk/Bosomworth-300K.yml
ID: ds_e45f0e0f202d
API: /v1/datasets/ds_e45f0e0f202d

Plot