Ta2H4O7

ceramic

· JVASP-54746· Ta2H4O7

Ta₂H₄O₇ is a tantalum oxide-based ceramic compound containing hydrogen in its crystal structure, representing a mixed-valence tantalum oxide system. This material belongs to the broader family of tantalum oxides and hydroxides, which are typically investigated for their potential in electrochemical, optical, and catalytic applications where chemical stability and electronic properties are important.

Electrochemical energy storageCatalytic applicationsDielectric coatingsResearch and developmentCorrosion-resistant coatingsRefractory ceramics

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1908	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	3.181	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.198	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000914	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00100	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-288	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	371.9	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	25.38	%	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)	0.1489	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.949	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.

Ta2H4O7 — Properties & Data | MatWorld

Ta2H4O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental