Al2Si2O7 — Properties & Data | MatWorld

Al2Si2O7

Name: Al2Si2O7
Brand: MatWorld

ceramic

· JVASP-50014· Al2Si2O7

Al2Si2O7 is an aluminosilicate ceramic compound belonging to the feldspar and clay mineral family, characterized by a 1:1 molar ratio of alumina to silica. This material is encountered in traditional ceramics, refractory applications, and mineral-based composite systems where the alumina-silica balance provides intermediate thermal stability and chemical resistance compared to pure silicates or alumina. Engineers select aluminosilicate ceramics like this composition for applications requiring moderate-to-high temperature performance with good chemical durability, though the specific phase stability and mechanical behavior of this stoichiometry should be verified for critical engineering use.

refractory brick and kiln liningsceramic tile and structural claymineral fillers in compositeshigh-temperature insulationglass-ceramic precursorsgeotechnical and construction materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	3.112	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	5.444	eV	DFT · OptB88vdW
↳	7.030	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.836	-	DFT · OptB88vdW
↳	2.380	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000791	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000541	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-116.6	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	379.8	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)	0.00530	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.092	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.

Al2Si2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental