TeF4 — Properties & Data | MatWorld

TeF4

ceramic

· TeF4

Tellurium tetrafluoride (TeF₄) is an inorganic ceramic compound combining tellurium with fluorine, forming a crystalline solid with potential applications in specialty optical and chemical processing contexts. TeF₄ remains primarily a research-phase material rather than a mature industrial ceramic; however, tellurium fluorides are investigated for infrared optics, fluoride-based glass matrices, and corrosive-environment chemical handling where their chemical stability and refractive properties are advantageous. Engineers would consider this material in niche photonics or laboratory-scale corrosion-resistant equipment where its unique fluoride chemistry and thermal stability offer advantages over conventional oxide ceramics or polymers.

infrared optical components (experimental)fluoride glass precursorcorrosive chemical containmentspecialty ceramics researchhigh-temperature chemical processing

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1596	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	4.127	eV	DFT · OptB88vdW
↳	6.466	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	10.99	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	3.105	-	DFT · OptB88vdW
↳	2.203	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	2.283	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.087	me	DFT · OptB88vdW · 27°C
Thermoelectric Power Factor(PF)2 entries	0.00110	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000984	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-354.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	172.7	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.000	%	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.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.165	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.

TeF4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental