MgSiAs2 — Properties & Data | MatWorld

MgSiAs2

ceramic

· JVASP-36581· MgSiAs2

MgSiAs₂ is a ternary ceramic compound combining magnesium, silicon, and arsenic—a relatively uncommon material in the broader family of III–V and II–IV semiconductors and ceramics. This is primarily a research and specialized material rather than a commodity engineering ceramic; it appears in the literature for applications requiring specific electronic, optical, or thermal properties in niche semiconductor and optoelectronic contexts. Engineers would consider it where conventional materials like GaAs or SiC cannot meet performance requirements, though availability, processing maturity, and cost typically limit adoption to high-value research, space, or military applications.

Semiconductor researchOptoelectronic devicesHigh-temperature electronicsThermal management substratesExperimental photovoltaicsSpace/defense applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	8,728.4	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2900	-	DFT · OptB88vdW
Shear Modulus(G)	4,587.5	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1266	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.366	eV	DFT · OptB88vdW
↳	2.097	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	12.70	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	10.61	-	DFT · OptB88vdW
↳	7.861	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.4533	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.6733	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.4705	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00161	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00204	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-146.9	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	253.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	20.89	%	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.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.3371	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.

MgSiAs2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental