LiYF4

ceramic

· LiYF4

Lithium yttrium fluoride (LiYF₄) is a crystalline ceramic compound combining lithium, yttrium, and fluoride ions, primarily investigated as a host material for rare-earth dopants in photonic and laser applications. This material is notable for its optical transparency in the ultraviolet and infrared regions, making it valuable for solid-state laser systems, particularly when doped with rare-earth ions like erbium or neodymium for fiber lasers and amplifiers used in telecommunications and industrial processing. Engineers select LiYF₄ over alternative fluoride ceramics for its favorable thermal stability, low phonon energy (enabling efficient energy transfer between dopant ions), and compatibility with fiber coupling in compact laser modules.

solid-state laser hoststelecommunications amplifiersfiber laser systemsrare-earth ion dopinginfrared opticsprecision industrial processing

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	12,525.5	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3300	-	DFT · OptB88vdW
Shear Modulus(G)	5,205.4	ksi	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1424	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Filter by

Method

Property	Value	Unit	Conditions
Band Gap(Eg)	8.150	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)2 entries	8.060	-	DFT · OptB88vdW
↳	5.275 range 2.361–8.189median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)	2.367	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	1.290	%	DFT · TBmBJ

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.977	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

LiYF4 — Properties & Data | MatWorld

LiYF4

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental