Beryllium fluoride (BeF₂) is an inorganic ceramic compound belonging to the fluoride ceramic family, known for its exceptional optical transparency across infrared wavelengths and high chemical stability. While primarily investigated in research and specialized optical applications rather than mainstream industrial use, BeF₂ is of particular interest for infrared optics, laser windows, and high-temperature thermal applications where superior transparency and thermal durability are required. Engineers consider this material when standard optical ceramics (like sapphire or fused silica) are inadequate for IR transmission or when extreme chemical resistance combined with optical clarity is critical.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 0.000 | Pa | — | ||
Poisson's Ratio(ν) | 0.1300 | - | — | ||
Shear Modulus(G) | 0.000 | Pa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 1.314 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 8.033 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 3.390 | - | — | ||
| ↳ | 3.418 | - | — | ||
| ↳ | 2.658 range 1.829–3.487median 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 | 0.06646 | C/m² | — | ||
| ↳ | 0.02350 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -160 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.01120 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -3.547 | eV/atom | — | ||
| ↳ | -3.429 | eV/atom | — |