Cesium Iodide (CsI) Optical Crystals

Cesium Iodide is useful for beam splitters for Far IR spectrophotometers, IR transmission windows and scintillator applications. Because this material is so soft and extremely hygroscopic, it is very difficult to polish.

 

 

Optical Properties - Cesium Iodide (CsI) Optical Crystals

Transmission Range: 250nm to 55µm
Refractive Index: 1.739 at 10.6µm
Reflection Loss: 13.6% @ 10.6µm ( 2 surfaces)

Physical Properties-- Cesium Iodide (CsI) Optical Crystals

Melting Point: 621° C
Hardness (Knoop): 20 psi
Young's Modulus: 5.3 GPa
Modulus of Rupture: 810 psi
Apparent Elastic Limit: 810 psi
Structure: Cubic, no cleavage

Chemical Properties-- Cesium Iodide (CsI) Optical Crystals

Solubility: 44 gm/ 100 gm water @ 0° C. Soluble in alcohol.