Caesium Iodide (CsI)
| Properties (CsI) | |
| Transmission Range | 0.24 - 70 µm |
| Refractive Index | 1.73916 @10.0 µm |
| Reflective Loss | 13.6% @10.0 µm |
| Reststrahlen | 145.8 µm, 118 µm |
| Density | 4.5 g/cm3 |
| Melting Point | 621°C |
| Molecular Weight | 259.83 |
| Thermal_Conductivity | 1.13 W/(m·K) |
| Specific Heat | 201 J/(kg·K) @20°C |
| Thermal Expansion | 50 · 10-6 /°C (@ 25...50°C) |
| Hardness (Mohs) | |
| Young`s Modulus | 5.3 GPa |
| Shear Modulus | 6.24 GPa |
| Bulk Modulus | 12.67 GPa |
| Rupture Modulus | 5.5 MPa |
| Elastic Coefficient | C11 = 24.6; C12 = 6.7; C44 = 6.24 GPa |
| Dielectric Constant | 5.65 @25°C, f = 1 MHz |
| Solubility in Water | 44.0g / 100g@0°C; 160g / 160g@61°C |
| Type of Material | Single crystal, synthetic |
| Crystal Structure | Cubic, CsCl type structure, a = 4.5679 Å |
| Cleavage Planes | No Cleavage |
| Standard diameter | 70 mm, 100 mm |
| Application | undoped CsI for IR spectroscopy, Cs:Tl and CsI:Na as scintillator material |
| Remarks | Material is very soft, difficult to polish and sensitive in combination with humidity. Soluble in weak alcohol, max. temperature for application: 200°C. |
Transmission spectrum
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This symbol denotes crystal grown in-house.