LiF

LiF

LiF

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