Almaz Optics, Inc.
12 Chadsford Ct.  Marlton, NJ 08053, USA
Tel:  856 797-0491, Fax: 856 797-0228
e-mail: mail@almazoptics.com

 

KRS-5

KRS-5 is used for attenuated total reflection prisms, IR windows and lenses where transmission in the 0.6 µm - 40 µm range is desired. It has a tendency to cold-flow and change its shape with time. KRS-5 is only slightly soluble in water but can be dissolved in alcohol, nitric acid, and aqua regia. This material is considered toxic and should be handled with care.
Maximum available size: 120 mm Dia x 30 mm Thk.

Main Properties

Chemical Formula

42% TlBr, 58% TlJ

Crystal Class

Cubic

Lattice Constant, Å

4.125

Density, g/cm3 at 289 K

7.37
Reflection Loss, % for two surfaces at 10 µm 28.4
Dielectric Constant for 102-107 Hz at 298 K 32.9-32.5
Melting Temperature, K 687
Thermal Conductivity, W/(m K) at 293 K 0.544
Thermal Expansion, 1/K at 293 K 58 x 10-6
Solubility, g/100 g H2O 0.05

Knoop Hardness

33.2 [110], 39.8 [100]
Young's Modulus, GPa 15.85
Rupture Modulus, GPa 0.12
Shear Modulus, GPa 5.79
Bulk Modulus, GPa 19.77

Refractive Index

Wavelength, µm

0.58

1.01

2.33

11.04

14.98

18.16

20.57

25.16

29.81

33.00

39.38

Refractive Index

2.63

2.44

2.39

2.37

2.36

2.35

2.34

2.32

2.29

2.27

2.22