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Products › Materials › KRS5 Thallium Bromo-Iodide (TlBr-TlI)
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KRS5 Thallium Bromo-Iodide (TlBr-TlI) |
| KRS5 deep IR material with a high refractive index, KRS5 is used extensively in spectroscopy for ATR prisms, windows and lenses. In conjunction with Germanium, KRS5 can also be used in athermalised IR imaging systems. |
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Product Data |
| Transmission Range : |
0.6 to 40 μm |
| Refractive Index : |
2.371 at 10 μm (1)(3) |
| Reflection Loss : |
28.4% at 10 μm (2 surfaces) |
| Absorption Coefficient : |
n/a |
| Reststrahlen Peak : |
n/a |
| dn/dT : |
-235 x 10-6 /°C |
| dn/dμ = 0 : |
7 μm |
| Density ; |
7.371 g/cc (3) |
| Melting Point : |
414.5 °C (3) |
| Thermal Conductivity : |
0.544 W m-1 K-1 at 293K |
| Thermal Expansion : |
58 x 10-6 /°C (2) |
| Hardness : |
Knoop 40.2 (2) |
| Specific Heat Capacity : |
200 J Kg-1 K-1 at 273K |
| Dielectric Constant : |
32.5 |
| Youngs Modulus (E) : |
15.85 GPa (2) |
| Shear Modulus (G) : |
5.79 GPa (2) |
| Bulk Modulus (K) : |
19.78 GPa (2) |
| Elastic Coefficients : |
C11=331; C12=13.2; C44=5.79 |
| Apparent Elastic Limit : |
26.2 MPa (2) |
| Poisson Ratio : |
0.369 |
| Solubility : |
0.05g/100g water at 293K |
| Molecular Weight : |
42 mole% TlBr; 58 mole% TlI |
| Class/Structure : |
Cubic, CsCl structure, Pm3m, No cleavage (3) |
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.
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Refractive Index |
| µm |
No |
µm |
No |
µm |
No |
| 0.54 |
2.68059 |
1.00 |
2.44620 |
1.50 |
2.40774 |
| 2.00 |
2.39498 |
3.00 |
2.38574 |
4.00 |
2.38204 |
| 5.00 |
2.37979 |
6.00 |
2.37797 |
7.0 |
2.37627 |
| 8.0 |
2.37452 |
9.0 |
2.37267 |
10.0 |
2.37069 |
| 11.0 |
2.36854 |
12.0 |
2.36622 |
13.0 |
2.36371 |
| 14.0 |
2.36101 |
15.0 |
2.35812 |
16.0 |
2.35502 |
| 17.0 |
2.35173 |
18.0 |
2.34822 |
19.0 |
2.34451 |
| 20.0 |
2.34058 |
21.0 |
2.33643 |
22.0 |
2.33206 |
| 23.0 |
2.32746 |
24.0 |
2.32264 |
25.0 |
2.31758 |
| 26.0 |
2.31229 |
27.0 |
2.30676 |
28.0 |
2.30098 |
| 29.0 |
2.29495 |
30.0 |
2.28867 |
31.0 |
2.28212 |
| 32.0 |
2.27531 |
33.0 |
2.26823 |
34.0 |
2.26087 |
| 35.0 |
2.25322 |
36.0 |
2.24528 |
37.0 |
2.23705 |
| 38.0 |
2.22850 |
39.0 |
2.21965 |
40.0 |
2.21047 |
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Product Notes |
KRS-5 crystalises by the sealed-ampoule Stockbarger technique. Starting materials of the highest purity are selected to ensure that there are no anionic absorption bands between 2μm and 16μm and all crystals are checked for quality by using a pathlength of 120mm.
CAUTION: Thallium salts are considered TOXIC and should be handled with care.
REFERENCES
(1) Rodney and Malitson J.Opt Soc.Am. V46, p 956, 1953
(2) Combes, Ballard, McCarthy: J.Opt Soc.Am. V41, p 215, 1951
(3) Handbook of Optical Constants, ed Palik, V3, ISBN 0-12-544423-0
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Data provided is extracted from our technical handbook of materials. While every attempt has been made to verify the source of the information, Crystran Ltd accept no responsibility for accuracy of data |
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14001 certified through SGS. |
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