KBr
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. |
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 |
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Properties of KBr