Tb2YbS4

ceramic

· JVASP-53358· Tb2YbS4

Tb2YbS4 is a rare-earth sulfide ceramic compound combining terbium and ytterbium with sulfur, belonging to the family of lanthanide chalcogenides. This material is primarily of research and developmental interest rather than established industrial production, being investigated for applications requiring rare-earth ceramic properties such as thermal stability, optical functionality, or specialized electronic behavior. The terbium-ytterbium composition positions it within advanced materials research focused on luminescent, magnetic, or high-temperature ceramic systems where rare-earth dopants or host matrices offer performance advantages over conventional alternatives.

rare-earth research materialsluminescent ceramicshigh-temperature oxidation resistanceoptical/photonic devices (experimental)thermal barrier coatings (R&D)solid-state chemistry applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2564	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	2.162	eV	DFT · OptB88vdW
↳	2.835	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	20.02	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.152	-	DFT · OptB88vdW
↳	6.685	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.4633	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.723	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.1721	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00112	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00204	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-178.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	341.4	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	6.670	%	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)	-2.318	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.

Tb2YbS4 — Properties & Data | MatWorld

Tb2YbS4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental