Ta4S9Br8

ceramic

· JVASP-24378· Ta4S9Br8

Ta4S9Br8 is an experimental mixed-anion ceramic compound combining tantalum with sulfur and bromine constituents, representing a rare composition within the broader family of transition-metal chalcohalide materials. While not yet established in commercial production, this compound is of research interest for exploring novel ionic and electronic properties that could emerge from the simultaneous incorporation of both anionic sulfur and halide species. The material's potential lies in advancing fundamental understanding of structure-property relationships in complex ceramic systems, with possible future relevance to solid-state electronics, ion-conducting ceramics, or specialty optical applications if synthesis and phase stability can be reliably controlled.

experimental research compoundsolid-state chemistry studieselectronic materials developmentionic conductivity researchhigh-temperature ceramic processing

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1730	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.194	eV	DFT · OptB88vdW
↳	1.491	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.187	-	DFT · OptB88vdW
↳	6.497	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000423	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000200	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-387.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	305.6	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	32.43	%	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)	-0.8478	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.

Ta4S9Br8 — Properties & Data | MatWorld

Ta4S9Br8

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental