Lithium Fluoride (LiF)
| Properties (LiF) | |
| Transmission Range | 0.105 ... 9 µm |
| Refractive Index | 1.37327 @2.5 µm; 1.624 @0.121 µm |
| Reflective Loss | 4.4% @4.0 µm |
| Reststrahlen | 26 µm |
| Density | 2.63905 g/cm3 |
| Melting Point | 870°C; 848°C |
| Molecular Weight | 25.94 |
| Thermal Conductivity | 11.3 W/(m·K) @41°C |
| Specific Heat | 1562 J/(kg·K) |
| Thermal Expansion | 37 · 10-6 /°C @0°... 100°C |
| Hardness (Mohs) | 102-113 (Indenter load: 600g) |
| Young`s Modulus | 64.79 GPa |
| Shear Modulus | 55.14 GPa |
| Bulk Modulus | 62.03 GPa |
| Rupture Modulus | 10.8 MPa |
| Elastic Coefficient | C11 = 112; C12 = 45.6; C44 = 63.2 GPa |
| Dielectric Constant | 9.0 @25°C, f = 100...109 Hz |
| Solubility in Water | 0.27g / 100g @18°C |
| Type of Material | Single crystal, synthetic |
| Crystal Structure | Cubic, NaCl type structure, a0= 4.026 Å |
| Cleavage Planes | (100) |
| Standard Diameter | 145 mm, 200 mm |
| Application | X-ray monochromator plates; Optical material for VUV applications |
| Remarks | Tends to create colour centers; max. temperature for application: 400°C |
Transmission spectrum
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This symbol denotes crystal grown in-house.