CESIUM IODIDE, CsI
Cesium Iodide is used for prisms and cell windows in the infrared up to 50 µm. 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.
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Main Properties |
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Chemical Formula |
CsI |
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Crystal Class |
Cubic |
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Lattice Constant, Å |
4.57 |
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Density, g/cm3 at 291 K |
4.51 |
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Dielectric Constant for 106 Hz at 298 K |
5.65 |
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Melting Temperature, K |
894 |
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Thermal Conductivity, W/(m K) at 298 K |
1.1 |
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Thermal Expansion, 1/K at 293 K |
39.1 x 10-6 |
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Specific Heat, cal/(g K) at 293 K |
0.048 |
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Debye Temperature, K |
93.6 |
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Bandgap, eV |
6.2 |
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Solubility, g/100 g H2O at 273 K |
44 |
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Young's Modulus, GPa |
5.30 |
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Reflection Loss for two surfaces at 10 um, % |
13.6 |
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Refractive Index |
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Wavelength, µm |
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 |
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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 |