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Yttrium lithium fluoride
Identifiers
CAS Number	39345-89-6;
3D model (JSmol)	Interactive image;
PubChem CID	22645984;
CompTox Dashboard (EPA)	DTXSID90627285 ;
	InChI InChI=1S/4FH.Li.Y/h4*1H;;/q;;;;+1;+3/p-4 Key: HIQSCMNRKRMPJT-UHFFFAOYSA-J;
	SMILES [Li+].[F-].[F-].[F-].[F-].[Y+3];
Properties
Chemical formula	F4LiY
Molar mass	171.84 g·mol−1
Related compounds
Other cations	Lithium holmium fluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Yttrium lithium fluoride (LiYF₄, sometimes abbreviated YLF) is a birefringent crystal, typically doped with neodymium or praseodymium and used as a gain medium in solid-state lasers.^[1] Yttrium is the substitutional element in LiYF_4. The hardness of YLF is significantly lower than other commons crystalline laser media, i.e. yttrium aluminium garnet.^[2]

References

^ Ignat’ev, A. I.; Nikonorov, N. V.; Mochalov, I. V.; Tsygankova, E. V.; Reĭterov, V. M. (2007-11-01). "Features of the etching of an yttrium–lithium fluoride crystal in HNO3 solutions". Journal of Optical Technology. 74 (11): 776–778. doi:10.1364/JOT.74.000776.
^ Chicklis, E.P.; Folweiler, R.C.; Naitnan, C.S. "0.85 MICRON SOLID STATE LASER: MATERIAL EVALUATION" (PDF). Archived (PDF) from the original on May 10, 2022. Retrieved 10 May 2022.

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