FeI2 — Properties & Data | MatWorld

FeI2

Name: FeI2
Brand: MatWorld

metal

· FeI2

Iron iodide (FeI₂) is a layered metal-halide compound that exists primarily as a research material rather than a commercial engineering grade. This material belongs to the family of transition metal halides and has attracted attention in materials science for its layered crystal structure, which exhibits weak van der Waals bonding between atomic planes. While not yet established in mainstream industrial applications, FeI₂ and related layered metal halides are being investigated for potential use in advanced electronics, energy storage, and two-dimensional material research, where the ability to exfoliate into thin layers could enable novel device architectures.

research and developmentlayered materials/2D materialsexperimental electronicsbattery and energy storage researchthin-film device engineering

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	3,157.5	ksi	DFT · OptB88vdW
Exfoliation Energy(Eexf)	83.19	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2600	-	DFT · OptB88vdW
Shear Modulus(G)	1,868.1	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1989	lb/in³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
↳	5.150	eV	Measured
Dielectric Constant (Relative Permittivity)(εr)	16.48	-	DFT · OptB88vdW
Magnetic Moment(μB)	3.999	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000842	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000818	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	8.007	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	7.527	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°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
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.07690	eV/atom	DFT · OptB88vdW
↳	-0.3614	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

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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.

FeI2

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