La2O3 — Properties & Data | MatWorld

La2O3

Name: La2O3
Brand: MatWorld

semiconductor

· La2O3

Lanthanum oxide (La₂O₃) is a rare-earth ceramic compound belonging to the lanthanide oxide family, valued for its wide bandgap and high refractive index. It is employed primarily in optical coatings, phosphor applications, and as a high-k dielectric material in advanced semiconductor devices, where it enables miniaturization and improved electrical performance compared to conventional silicon dioxide. The material is also investigated for potential use in solid-state electrolytes and thermal barrier coatings, making it particularly relevant for applications requiring exceptional thermal stability and dielectric properties.

optical coatings and lenseshigh-k gate dielectalsphosphor dopantssolid-state battery electrolytesthermal barrier coatingsadvanced semiconductor manufacturing

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	125.7	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3300	-	DFT · OptB88vdW
Shear Modulus(G)	52.03	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	5.674	kg/m³	DFT · OptB88vdW

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

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	5.400	eV	Measured
↳	0.5950	eV	DFT · PBE
↳	3.876	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	15.73 range 4.867–26.59median of 2 measurements	-	DFT · PBEsol
Magnetic Moment(μB)2 entries	0.000	μB	DFT
↳	0.000	µB	DFT · OptB88vdW

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.

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

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.9273	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)3 entries	-2.825	eV/atom	DFT
↳	-2.792	eV/atom	DFT · OptB88vdW
↳	-3.721	eV/atom	Measured

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.

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

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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.

La2O3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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