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

 

































CESIUM IODIDE, CsI

Cesium Iodide is used for prisms and cell windows in the infrared up to 50 Ám. Cesium Iodide is highly soluble in water and must be protected from moisture. The material is relatively soft, does not cleave and can withstand shock and rapid temperature changes. Maximum available size: 200 mm Dia x 100 mm Thk.


Main Properties

Chemical Formula CsI
Crystal Class Cubic
Lattice Constant, ┼ 4.57
Density, g/cm3 at 291 K 4.51
Dielectric Constant for 106 Hz at 298 K 5.65
Melting Temperature, K 894
Thermal Conductivity, W/(m K) at 298 K 1.1
Thermal Expansion, 1/K at 293 K 39.1 x 10-6
Specific Heat, cal/(g K) at 293 K 0.048
Debye Temperature, K 93.6
Bandgap, eV 6.2
Solubility, g/100 g H2O at 273 K 44
Young's Modulus, GPa 5.30
Reflection Loss for two surfaces at 10 um, % 13.6

Refractive Index

Wavelength, Ám

0.29

0.32

0.35

0.39

0.46

0.52

0.64

0.92

9.0

24.4

33.0

39.5

44.7

49.3

Refractive Index

1.98

1.94

1.90

1.86

1.82

1.80

1.78

1.76

1.74

1.72

1.70

1.68

1.66

1.64