HoTaO4 — Properties & Data | MatWorld

HoTaO4

ceramic

· JVASP-8801· HoTaO4

HoTaO4 is a rare-earth tantalate ceramic compound combining holmium and tantalum oxides, belonging to the family of complex oxide ceramics studied for high-temperature and specialized optical applications. This material is primarily of research and developmental interest rather than widely commercialized, with potential applications in high-temperature structural components, optical devices, and environments requiring chemical stability combined with dense ceramic properties. Engineers would consider this compound where rare-earth doping and tantalate chemistry offer advantages in thermal stability, radiation resistance, or photonic applications beyond what conventional ceramics provide.

high-temperature ceramicsoptical and photonic devicesradiation-resistant componentsrare-earth compoundsresearch and developmentspecialist refractory materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	193.6	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3200	-	DFT · OptB88vdW
Shear Modulus(G)	93.54	GPa	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	9.861	kg/m³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	4.054	eV	DFT · OptB88vdW
↳	5.324	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	19.42	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.941	-	DFT · OptB88vdW
↳	3.960	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.2577	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00113	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00103	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-338.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	358.2	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)	0.2092	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.313	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.

HoTaO4

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental