Ca4As2O — Properties & Data | MatWorld

Ca4As2O

ceramic

· Ca4As2O

Ca4As2O is a calcium arsenate ceramic compound with a densely packed crystal structure. This material belongs to the family of arsenic-containing ceramics and appears primarily in research and specialized industrial contexts rather than commodity applications. Its notable stiffness and moderate density make it relevant for high-temperature or chemically harsh environments where arsenic compounds offer unique thermal or electronic properties, though commercial adoption remains limited due to arsenic toxicity concerns and the availability of safer alternative ceramics.

High-temperature ceramics researchSemiconductor/electronic applicationsThermal barrier coatings (experimental)Specialized refractory materialsMaterials chemistry and phase studies

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	61.53	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2100	-	DFT · OptB88vdW
Shear Modulus(G)	44.36	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	3.422	kg/m³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.237	eV	DFT · OptB88vdW
↳	1.795	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	25.26	-	DFT · OptB88vdW
↳	18.27 range 8.654–27.89median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.576	-	DFT · OptB88vdW
↳	6.831	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.6667	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.9033	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000868	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00200	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-112.8	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	249.9	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	27.41	%	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.892	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.

Ca4As2O

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental