Caesium Bromide (CsBr)
♦ Caesium Bromide (CsBr) Data Sheet ♦ Caesium Bromide (CsBr) MSDS
Caesium Bromide has limited application in the deep IR. Caesium Bromide is slightly more amenable to optical working than CsI and is sometimes used as a beamsplitter component in wide-band spectrophotometers
| Transmission Range : | 0.25 to 40 μm (1) |
| Refractive Index : | 1.6612 at 11 μm (1) |
| Reflection Loss : | 11.6% at 11 μm (2 surfaces) |
| Absorption Coefficient : | n/a |
| Reststrahlen Peak : | 121.2 μm (2) |
| dn/dT : | +79 x 10-6/°C at 0.6 μm |
| dn/dμ = 0 : | 5.3 μm |
| Density : | 4.44 g/cc |
| Melting Point : | 636 °C |
| Thermal Conductivity : | 0.94 W m-1 K-1 at 273K |
| Thermal Expansion : | 47.9 x 10-6 /°C at 273K |
| Hardness : | Knoop 19.5 with 200g indenter |
| Specific Heat Capacity : | 263.8 J Kg-1 K-1 (3) |
| Dielectric Constant : | 6.51 at 2 MHz |
| Youngs Modulus (E) : | 15.85 GPa (4) |
| Shear Modulus (G) : | 7.5 GPa |
| Bulk Modulus (K) : | 13.01 GPa |
| Elastic Coefficients : | C11=30.97; C12=4.03; C44=7.5 |
| Apparent Elastic Limit : | 8.4 MPa (1220 psi) (4) |
| Poisson Ratio : | 0.279 |
| Solubility : | 124.3g/100g water at 273K |
| Molecular Weight : | 212.83 |
| Class/Structure : | Cubic CsCl, Pm3m, no cleavage planes |
To download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page. To expand the transmission graphs, please click on the image.
| µm | No | µm | No | µm | No |
| 0.5 | 1.70896 | 1.0 | 1.67793 | 2.0 | 1.67061 |
| 3.0 | 1.66901 | 4.0 | 1.66813 | 5.0 | 1.66737 |
| 6.0 | 1.66659 | 7.0 | 1.66573 | 8.0 | 6477 |
| 9.0 | 1.6637 | 10.0 | 1.66251 | 11.0 | 1.6612 |
| 12.0 | 1.65976 | 13.0 | 1.6582 | 14.0 | 1.6561 |
| 15.0 | 1.65468 | 16.0 | 1.65272 | 17.0 | 1.65062 |
| 18.0 | 1.64838 | 19.0 | 1.646 | 20.0 | 1.64348 |
| 21.0 | 1.6408 | 22.0 | 1.63798 | 23.0 | 1.635 |
| 25.0 | 1.62856 | 26.0 | 1.62509 | 27.0 | 1.62146 |
| 28.0 | 1.61764 | 29.0 | 1.61365 | 30.0 | 1.60947 |
| 31.0 | 1.6051 | 32.0 | 1.60053 | 33.0 | 1.59576 |
| 34.0 | 1.59078 | 35.0 | 1.58558 | 36.0 | 1.58016 |
| 37.0 | 1.5745 | 38.0 | 1.5686 | 39.0 | 1.56245 |
Caesium Bromide is grown by sealed ampoule Stockbarger technique. CsBr is a soft pliable material.
REFERENCES:
(1) Handbook Optical Constants, ed Palik, V3, ISBN 0-12-544423-0
(2) Mitsuishi et al., J Opt Soc. Am. V52, p14, 1962
(3) Kelly, Bureau of Mines Bulletin, No371, p51, 1934
(4) S.Ballard et al; J.Opt.Soc.Am. Vol42, p684, 1952
REFERENCES:
(1) Handbook Optical Constants, ed Palik, V3, ISBN 0-12-544423-0
(2) Mitsuishi et al., J Opt Soc. Am. V52, p14, 1962
(3) Kelly, Bureau of Mines Bulletin, No371, p51, 1934
(4) S.Ballard et al; J.Opt.Soc.Am. Vol42, p684, 1952
