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KBr
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Potassium Bromide
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Description
Potassium Bromide is one of the most useful materials for general purpose spectroscopic windows and applications where sensitivity to moisture is unimportant. KBr is the most commonly used beamsplitter material for IR spectrophotometers.
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Properties
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| Absorption Coefficient (cm-1) |
1.6 x 10-4 at 3.8µ |
| Apparent Elastic Limit (MPa) |
1.1 (160psi) |
| Bulk Modulus (K) (GPa) |
15.03 |
| Cleavage Planes |
(100) |
| Density (g·cm-3) |
2.753 |
| Dielectric Constant |
4.9 at 1MHz |
| Elastic Coefficient C11 |
34.5 |
| Elastic Coefficient C12 |
5.4 |
| Elastic Coefficient C44 |
5.08 |
| Hardness (knoop) (100) direction |
7.0 |
| Melting Point (°C) |
730 |
| Molecular Weight |
119.01 |
| Poisson Ratio |
0.203 |
| Reflection Loss (%) |
8.3 at 11µ (2 surfaces) |
| Refractive Index |
1.53 at 10µ |
| Restrahlen Peak (µ) |
77.6 |
| Shear Modulus (G) (GPa) |
5.08 |
| Solubility (g/100g H2O) |
53.48 at 293K |
| Specific Heat Capacity (J·kg.m-1·K-1) |
435 |
| Structure |
Cubic |
| Thermal Conductivity (W·m-1·K-1) |
4.816 at 319K |
| Thermal Expansion (K-1 at 300K) |
43 X 10-6 |
| Transmission Range (µ) |
0.23 to 25 |
| Youngs Modulus (E) (GPa) |
26.8 |
