Barium fluoride (BaF₂) is an ionic ceramic compound valued for its optical transparency across a broad spectrum, from the ultraviolet through infrared regions. It is widely deployed in optical systems, laser windows, and spectroscopic instruments where conventional glass would absorb or scatter radiation. Engineers select BaF₂ over alternatives like CaF₂ or fused silica when demanding applications require excellent transmission in both near-UV and mid-infrared bands, combined with reasonable mechanical stiffness and resistance to thermal shock.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 54.43 | GPa | — | ||
| ↳ | 54.43 | GPa | — | ||
| ↳ | 70.68 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.000744 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.3076 | - | — | ||
| ↳ | 0.4600 | - | — | ||
Shear Modulus(G)3 entries | 24.03 | GPa | — | ||
| ↳ | 24.03 | GPa | — | ||
| ↳ | 16.91 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 5.651 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 9.100 | eV | — | ||
| ↳ | 5.865 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 926.3 | - | — | ||
| ↳ | 5.284 range 2.398–8.170median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -180.5 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.08010 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -4.176 | eV/atom | — | ||
| ↳ | -3.980 | eV/atom | — |