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Refractive Index of Alkali Halides and Its Wavelength and Temperature Derivatives

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Refractive Index of Alkali Halides and Its Wavelength and Temperature Derivatives Refractive index of alkali halides and its wavelength and temperature derivatives Cite as: Journal of Physical and Chemical Reference Data 5, 329 (1976); https://doi.org/10.1063/1.555536 Published Online: 15 October 2009 H. H. Li ARTICLES YOU MAY BE INTERESTED IN Refractive index of alkaline earth halides and its wavelength and temperature derivatives Journal of Physical and Chemical Reference Data 9, 161 (1980); https://doi.org/10.1063/1.555616 Refractive index of silicon and germanium and its wavelength and temperature derivatives Journal of Physical and Chemical Reference Data 9, 561 (1980); https:// doi.org/10.1063/1.555624 Optical constants of graphene measured by spectroscopic ellipsometry Applied Physics Letters 97, 091904 (2010); https://doi.org/10.1063/1.3475393 Journal of Physical and Chemical Reference Data 5, 329 (1976); https://doi.org/10.1063/1.555536 5, 329 © 1976 American Institute of Physics for the National Institute of Standards and Technology. Refractive Index of Alkali Halides and Its Wavelength and Temperature Derivatives H. H. Li Center for Information and Numerical Data Analysis and Synthesis, Purdue University, West Lafayette, Indiana 47906 Refractive index data for 20 alkali halide" are l>yhRII<:tiv,.ly "Ilrvpyprl, p.ompil,.rl. !mel !malyzNi. The most probable values at 293 K for the transparent ref"ion are generated for the materials for which experimental data are sufficiently abundant and reli\lble. Provisional values are also provided for the wavelen~th regions where available data are insufficient or missing. Rea!;Oonable estimations of refrac­ tive index for the very scantily measured materials were made by incorporatinl! the dielectric constants and wavelengths of absorption peaks into a simplified dispersion equation. Temperature derivatives of refractive index for most of the alkali halides were unavailable. However, using the existing data for the five most commonly used alkali halides, novel empirical facts were discovered and dn/dT for­ mllIR" w~rp p.on"trtl('tprl for !-Ill of the alkali halides. The calculated dnldT values agree remarkably well with the existing experimental data. Key words: Alkali halides: optical constants: refractive index: temperature coefficient of refractive index. Contents List of Tables ...... '" ... _... , .... '" .... __ " _..... " .... 329 3.8. Sodium Iodide. NaI._ .................... -... 408 List of Figures ............................................ 33] 3.9. Potassium Fluoride, KF .................... 414 List of Symbols ..................... _............. _....... 332 3.10. Potassium Chloride, KCl. .................. 421 1. Introduction ........................................... 332 3.11. Potassium Bromide, KBr. .................. 436 2. Theoretical Background and Empirical 3.12. Potassium Iodide, 1\.1. ....................... 449 Formulas. __ ... '" .................................. _. 336 3.13. Rubidium Fluoride, RbF .................... 460 2.1. Refractive Index ............................... 337 3.14. Rubidium Chloride, RhCJ .................. 466 2.2. Temperature Derivative of Refractive In- 3.15. Rubidium Bromide, RbBr .................. 474 dex, dn/dT ... .................................... 339 3.16. Rubidium Iodide, RbI. ................ , '" .. , 481 3. Numerical Data ... _............... _.. _................ 341 3.17. Cesium Fluoride, CsF .. , .................... 488 3.1. Lithium Fluoride, LiF '" .................... 341 3.18. Cesium Chloride, CsC1. ........ '" ......... 494 3.2. Lithium Chloride, LiCl.. ................... 361 3.19. Cesium Bromide, CsBr ..................... 502 3.3. Lithium Bromide, LiBr. .. '" ., ... _......... 366 3.20. Cesium Iodide, Csl. .... , .................... 512 3.4. Lithium Iodide, Lil .......................... 371 4. Conclusions and Recommendations ............. 522 3.5. Sodium Fluoririp., NaF.._._ .... .. 376 s. Acknowlerlgment~._ .. __ ..... _. __ . ____ ._. _... _______ _ 526 3.6. Sodium Chloride, NaCl.. ................... 385 6. References ... _......................................... 526 3.7. Sodium Bromide, NaBr. .. _......... _...... _. 402 List of Tables Page 1. Available Experimental Data Sets on the 5. Parameters for the dn/dT Formulas of Alkali Refractive Index and Its Temperature Halides at Room Temperature ............... 342 Derivative ...... _........ _.......................... 333 6. Recommended V alueson the Refractive In­ 2. Some Physical Properties of Alkali Halides dex and Its Wavelength and Temperature at Room Temperature ............. -.... _....... - 835 Derivatives for LiF at 293 K ................. .. 347 3. Available Parameters for Dispersion Equa­ 7. Source and Technical Information on the Re­ tions of Alkali Halides at Room T empera- fractive Index and dn/ dT measurements of tures ................................ _.......... _" _., 338 LiF .................................................. 352 4. Some Useful Parameters for Dispersion Equa­ 8. Experimental Data on the Refractive Index tions of Alkali Halides at Liquid Helium of LiF .............. _................................ 355 Temperature ................ _..................... 339 9. Experimental Data on dn/dT of LiF .......... .. 359 10_ Comparison of Dispersion Equations Pro- posed for LiF ........... _.................. , .... _.. 360 11. Recommended Values on the Refractive In- C0l>yril!ht CD 1976 by thp U.S. Secretary of Cnmm .. rce on l.ehalf of tl](' United States. Thi, ("oPFi:rht will h~ as"i~ned to the American In~titut .. of Physics and the American Chemical dex and Its Wavelength and Temperature 50("iety. til whom all requests rc!!ardin!! reproduction should he addre"s("d. Derivatives for LiCI at 293 K ................. _ 362 329 J. Phys_ Chern. Ref. Data, Yol. 5, No.2, ] 976 330 H. H. U i,ist of l' abies - Continued Pa~e 12. Source and Technical Information on the Re­ 34. Source and Technical Information on the Re­ fractive Index and dn/dT measurements of fractive Index and dn/dT Measurements LiCl ... '" ... ......................................... 365 of NaI ..... , '" ...................................... 413 13. Experimental Data on the Refractive Index 35. Experimental Data on the Refractive Index of LiCl............ .................................. 365 of NaI ..... , ... ...... ................................ 413 14. Recommended Values on the Refractive In- 36. Recommended Values on the Refractive In­ dex and Its Wavelenglh ami TellljJelalule dex and Its WaveleIlglb allU TellljJeraluIe Derivatives for LiBr at 293 K. ........... ...... 367 Derivatives for KF at 293 K.................... 415 15. Source and Technical Information on the Re­ 37. Source and Technical Information on the Re­ fractive Index and dn/dT measurements of fractive Index and dn/dT Measurements LiBr... ... ............................................ 370 of KF................................................ 419 16. Experimental Data on the Refractive Index 38. Experimental Data on the Refractive Index of LiBr ... '" ...... ... ........... .... ...... .... ...... 370 of KF... ............................................. 419 17. Recommended Values on the Refractive In­ 39. Comparison of Dispersion Equations Pro- dex and Its Wavelength and Temperature posed for KI'...................................... 420 Derivatives for Lil at 293 K............ ....... 372 40. Recommended Values on the Refractive In- 18. Sourcc and Tcchnical Information on the Re dex lind Its Wavelength and Temperature fractive Index and dnl dT Measurements of Derivatives for KCl at 293 K...... ............ 423 Lil... ... .......... .................................... 375 41. Source and Technical Information on the Re­ 19. Experimental Data on the Refractive Index fractive Index and dn/dT Measurements of Lil ..... , '" ....................................... 375 of KCI............................................... 428 20. Recommended Values on the Refractive In­ 42. Experimental Data on the Refractive Index dex and Its Wavelength and Temperature of K(~l... ... ................... ...................... 43] Derivatives for NaF at 293 K......... ......... 377 43. Experimental Data on dn/dT of KCI.... ........ 434 21. Source and Technical Information on the Re­ 44. Comparison of Dispersion Equations Pro- fractive Index and dn/dT Measurements of posed for KCl..................................... 435 NaF.................................................. 381 45. Recommended Values on the Refractive In- 22. Experimental Data on the Refractive Index dex and Its Wavelength and Temperature of NaF............................................... 382 Derivatives for KBr at 293 K........... ....... 438 23. Experimental Data on dn/dT of NaF ........... 383 46. Source and Technical Information on ihe Re­ 24. Comparison of DIspersIOn Equations Pro- fractive index and dn/dT Measurements posed for NaF............ ................ ........ 384 of KBr... ............................................ 443 25. Recommended Values on the Refractive In- 47. Experimental Data on the Refractive Index dex and Its Wavelength and Temper.<ltlll'P of KBr... ............................................ 445 Derivatives for NaCl at 293 K................. :-587 48. Experimental Data on dnldT of KBr.... ........ 447 26. Source and Technical Information on the Re­ 49. Comparison of Dispersion Equations Pro- fractive Index and dn/dT Measurements of posed for KBr..................................... 448 NaCl... ... ... ........................................ 392 50. Hecommended Values on the Refractive
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