FeO (iron(II) oxide or wüstite) is an ionic ceramic compound consisting of iron cations and oxygen anions, typically found as an intermediate or constituent phase rather than a standalone engineering material. It appears naturally in iron oxide systems and is commonly encountered as a component in steelmaking slags, foundry materials, and ceramic formulations where it influences thermal and chemical properties. Engineers select FeO-containing materials primarily for applications requiring specific oxidation behavior, thermal stability, or as part of multi-phase ceramic composites rather than for monolithic FeO itself, since pure wüstite is metastable at room temperature and prone to oxidation or reduction.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 26,155.4 | ksi | — | ||
| ↳ | 28,045.9 | ksi | — | ||
Poisson's Ratio(ν) | 0.3900 | - | — | ||
Shear Modulus(G)2 entries | 8,674 | ksi | — | ||
| ↳ | 7,246.1 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.2178 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 7.996 | µB | — | ||
Seebeck Coefficient(S) | -20.09 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.2048 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.410 | eV/atom | — | ||
| ↳ | -1.004 | eV/atom | — |