Lithium fluoride (LiF) single crystal
Transmission range |
0.105 --- 6µm |
Index of refraction |
1.37327 @2.5 µm; 1.624 @0.121 µm |
reflection loss |
4.4% @4.0 µm |
density |
2.63905 g/cm3 |
Melt point |
870°C; 848°C |
Thermal conductivity |
11.3 W/(m·K) @41°C |
Specific heat |
1562 J/(kg·K) |
Thermal conductivity |
37 · 10-6 /°C @0°---100°C |
hardness(Mohs) |
102-113 (Indenter load: 600g) |
Young modulus |
64.79 GPa |
shear modulus |
55.14 GPa |
modulus of rupture |
10.8 MPa |
Flexible coefficient |
C11 = 112; C12 = 45.6; C44 = 63.2 GPa |
Dielectric constants |
9.0 @25°C, f = 100...109 Hz |
water-solubility |
0.27g / 100g @18°C |
Material type |
Single crystal, synthetic |
Crystal structure |
Cubic, NaCl type structure, a0= 4.026 Å |
cleavage plane |
(100) |
size |
145 mm, 200 mm |
application |
X-ray monochromator plates; Optical material for VUV applications |
remark |
Tends to create colour centers; max. temperature for application: 400°C |
Lithium fluoride crystal transmissibility scope from vacuum ultraviolet 105nm to infrared 6.0μm. Lithium fluoride (LiF) crystals are the the best materials of vacuum ultraviolet transmittance . Is widely used to produce UV - visible - IR field optical window, lenses, prisms and refraction components. In addition, can also be used as "X detector" crystal.
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