Mg2Si — Properties & Data | MatWorld

Mg2Si

semiconductor

· Mg2Si

Mg2Si is an intermetallic semiconductor compound combining magnesium and silicon, belonging to the family of binary semiconductors with potential thermoelectric properties. It is primarily investigated as a thermoelectric material for waste heat recovery and power generation applications, where its combination of mechanical rigidity and low thermal conductivity makes it attractive for solid-state energy conversion. Mg2Si remains largely in research and development phases rather than high-volume production, but represents a promising alternative to conventional thermoelectrics due to its abundance of constituent elements, lower cost potential, and environmental compatibility compared to lead-based or rare-earth competitors.

thermoelectric power generationwaste heat recoverysolid-state cooling deviceshigh-temperature sensorssemiconductor researchlightweight structural composites

Compliance & Regulations

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

Units:

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Method

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)3 entries	52.86	GPa	DFT
↳	55.00	GPa	DFT · OptB88vdW
↳	52.86	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.000590	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.1800	-	DFT · OptB88vdW
↳	0.1709	-	DFT · PBE
Shear Modulus(G)3 entries	44.57	GPa	DFT
↳	45.60	GPa	DFT · OptB88vdW
↳	44.57	GPa	DFT · PBE

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
Thermal Conductivity(k)2 entries	4.000	W/(m·K)	Measured · 127°C
↳	4.000	W/(m·K)	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.

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Property	Value	Unit	Conditions	Source
Density(ρ)	2.242	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions	Source
Band Gap(Eg)3 entries	2.270	eV	Measured
↳	0.3810	eV	DFT · OptB88vdW
↳	0.6250	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	16.33	-	DFT · OptB88vdW
↳	13.82	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.05000	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.05000	me	DFT · OptB88vdW · 27°C
Electrical Conductivity(σ)	506.1	S/cm	Measured · 127°C
Electrical Resistivity(ρe)	0.0000198	Ω·m	Measured · 127°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)3 entries	0.00181	W/(m·K²)	Measured · 127°C
↳	0.00450	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00509	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)3 entries	-189	μV/K	Measured · 127°C
↳	-237.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	269	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	20.41	%	DFT · TBmBJ
Thermoelectric Figure of Merit(zT)	0.1808	-	Measured · 127°C

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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Method

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.2023	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.01117	eV/atom	DFT · OptB88vdW
↳	-0.2689	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.

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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

Export Control

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.