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Lithium fluoride (LiF) single crystal

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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