Potassium bromide (KBr) is an ionic halide ceramic compound that forms a face-centered cubic crystal structure. It is primarily used in optical and spectroscopic applications where transparency to infrared radiation is critical, including FTIR spectrometers, thermal imaging windows, and laboratory optics. KBr is valued for its wide infrared transmission range and relative ease of fabrication into precision optical components, though it is hygroscopic and mechanically softer than competing IR-transparent ceramics like sapphire or zinc selenide, making it suitable for laboratory rather than harsh field environments.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 21.64 | GPa | — | ||
| ↳ | 21.64 | GPa | — | ||
| ↳ | 17.27 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.7061 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.3479 | - | — | ||
| ↳ | 0.2800 | - | — | ||
Shear Modulus(G)3 entries | 7.327 | GPa | — | ||
| ↳ | 7.327 | GPa | — | ||
| ↳ | 10.90 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.801 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 7.600 | eV | — | ||
| ↳ | 4.602 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 4.771 | - | — | ||
| ↳ | 3.971 range 2.619–5.323median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -105.1 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -2.041 | eV/atom | — | ||
| ↳ | -1.870 | eV/atom | — |