As2O3 — Properties & Data | MatWorld

As2O3

Name: As2O3
Brand: MatWorld

ceramic

· As2O3

Arsenic trioxide (As₂O₃) is a ceramic compound and naturally occurring mineral form of arsenic oxide, commonly known as white arsenic. It has been historically important in glass manufacturing, particularly for producing optical and specialized glasses, and finds use in semiconductor applications and pharmaceutical contexts. As₂O₃ is notable for its role in controlling devitrification in glass systems and as a precursor material in compound semiconductor research, though its toxicity requires careful handling and makes it less common in modern consumer applications compared to safer alternative devitrification agents.

optical glass manufacturingsemiconductor precursor materialsglass devitrification controlhistorical arsenic compound applicationsmaterials research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	3,087.9	ksi	DFT · OptB88vdW
Exfoliation Energy(Eexf)	81.41	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2300	-	DFT · OptB88vdW
Shear Modulus(G)	2,043.6	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1432	lb/in³	DFT · OptB88vdW

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

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	4.000	eV	Measured
↳	0.000	eV	DFT · PBE
↳	3.374	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)2 entries	9.711	-	DFT · OptB88vdW
↳	6.480	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)	4.479	-	DFT · OptB88vdW
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	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)	0.00880	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)3 entries	-0.5210	eV/atom	DFT
↳	-1.261	eV/atom	DFT · OptB88vdW
↳	-1.380	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

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.

As2O3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental