YbY2S4 — Properties & Data | MatWorld

YbY2S4

ceramic

· JVASP-53487· YbY2S4

YbY2S4 is a rare-earth sulfide ceramic compound containing ytterbium and yttrium, belonging to the family of lanthanide chalcogenides. This material is primarily of research and development interest rather than established industrial production, with potential applications in photonic devices, solid-state lighting, and high-temperature optical systems where rare-earth dopants provide luminescent or thermal properties.

optical coatings and windowsluminescent materials researchhigh-temperature ceramicsphotonic device developmentrare-earth compound studies

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1994	lb/in³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.169	eV	DFT · OptB88vdW
↳	2.747	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	20.58	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.046	-	DFT · OptB88vdW
↳	6.676	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.5300	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.593	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.1683	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00120	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00198	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-193	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	335	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	8.050	%	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)	0.00270	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.335	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.

YbY2S4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental