Yttrium lithium fluoride

{{Chembox

|Section1={{Chembox Identifiers

| CASNo = 39345-89-6

| PubChem=22645984

| StdInChI=1S/4FH.Li.Y/h4*1H;;/q;;;;+1;+3/p-4

| StdInChIKey = HIQSCMNRKRMPJT-UHFFFAOYSA-J

| SMILES = [Li+].[F-].[F-].[F-].[F-].[Y+3]

}}

|Section2={{Chembox Properties

| Li=1|Y=1|F=4

}}

|Section8={{Chembox Related

| OtherCations = Lithium holmium fluoride

}}

}}

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.{{Cite journal |last=Ignat’ev |first=A. I. |last2=Nikonorov |first2=N. V. |last3=Mochalov |first3=I. V. |last4=Tsygankova |first4=E. V. |last5=Reĭterov |first5=V. M. |date=2007-11-01 |title=Features of the etching of an yttrium–lithium fluoride crystal in HNO3 solutions |url=https://opg.optica.org/jot/abstract.cfm?uri=jot-74-11-776 |journal=Journal of Optical Technology |language=EN |volume=74 |issue=11 |pages=776–778 |doi=10.1364/JOT.74.000776|url-access=subscription }} 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.{{Cite web |last=Chicklis |first=E.P. |last2=Folweiler |first2=R.C. |last3=Naitnan |first3=C.S. |title=0.85 MICRON SOLID STATE LASER: MATERIAL EVALUATION |url=https://apps.dtic.mil/sti/pdfs/AD0909527.pdf |archive-url=https://web.archive.org/web/20220510173745/https://apps.dtic.mil/sti/pdfs/AD0909527.pdf |url-status=live |archive-date=May 10, 2022 |access-date=10 May 2022}}