Scandium fluoride (ScF₃) is an ionic ceramic compound belonging to the perovskite-related fluoride family, known for its unusual negative Poisson's ratio—a property that makes it auxetic and capable of expanding laterally when compressed. This material is primarily studied in advanced materials research for applications requiring unusual mechanical behavior and thermal management properties, with particular interest in optical and photonic devices due to fluoride ceramics' broad infrared transparency. ScF₃ represents a promising class of engineering ceramics where the combination of low density and anomalous elastic behavior offers design advantages over conventional ceramics in specialized structural and optical applications.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 90.78 | GPa | — | ||
| ↳ | 21.56 | GPa | — | ||
Poisson's Ratio(ν) | -0.01000 | - | — | ||
Shear Modulus(G)2 entries | 40.75 | GPa | — | ||
| ↳ | 33.11 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.873 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 6.508 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 8.360 | - | — | ||
| ↳ | 10.81 | - | — | ||
| ↳ | 5.257 range 2.243–8.270median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.1179 | C/m² | — | ||
| ↳ | 0.2253 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -291.9 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -4.272 | eV/atom | — | ||
| ↳ | -4.115 | eV/atom | — |