Sm3TaO7 — Properties & Data | MatWorld

Sm3TaO7

ceramic

· JVASP-50323· Sm3TaO7

Sm₃TaO₇ is a rare-earth tantalate ceramic compound combining samarium oxide with tantalum pentoxide, representing a member of the pyrochlore or related rare-earth tantalate family. This material is primarily of research interest for high-temperature and electronic applications, where the combination of rare-earth and refractory metal oxides provides potential for thermal stability, ionic conductivity, and dielectric properties. It is not widely established in mature industrial production but is investigated for specialized roles where conventional oxides reach their performance limits.

solid-state electrolytesthermal barrier coatings (research phase)high-temperature ceramicsdielectric materialsrare-earth compound researchadvanced refractory applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2901	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	3.492	eV	DFT · OptB88vdW
↳	4.551	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.770	-	DFT · OptB88vdW
↳	3.810	-	DFT · TBmBJ
Electron Effective Mass(m*e)	2.483	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.710	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00137	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000989	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-302.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	301.9	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)	0.00920	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.585	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.

Sm3TaO7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental