FeSe2
metal· FeSe2
FeSe₂ (iron diselenide) is an intermetallic compound belonging to the pyrite-structure family of iron chalcogenides, characterized by its layered crystal structure and moderate elastic stiffness. This material is primarily of research interest as a potential semiconducting or thermoelectric compound, with applications being explored in energy conversion, photovoltaic devices, and catalytic systems rather than established industrial production. Engineers would consider FeSe₂ for specialized low-temperature electronic applications or as a precursor phase in composite materials, though it remains largely experimental compared to more mature alternatives like skutterudites or bismuth tellurides for thermoelectric use.
thermoelectric energy conversion (research)photovoltaic absorber layerscatalytic materials (hydrogen evolution)solid-state electronics (experimental)high-temperature phase materials
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 17,058.3 | ksi | — | ||
| ↳ | 17,220.3 | ksi | — | ||
Poisson's Ratio(ν) | 0.2000 | - | — | ||
Shear Modulus(G)2 entries | 13,313.1 | ksi | — | ||
| ↳ | 13,459.5 | ksi | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.2548 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.3280 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 36.83 | - | — | ||
| ↳ | 31.01 range 25.86–36.17median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -296.4 | µV/K | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.3869 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
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.