Lithium Fluoride (LiF)

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Crystallographic

Syngony Cubic
Symmetry Class m3m
Lattice Constants a = 4.026 Å
c = a
Cleavability (100), perfect
 

Optical

Refractive Index at ne 1.3931
Refractive Index at nF' - nC' 0.0040
Thermal Coefficient of Refractive Index at 3.39 microns for ±60 °C (-1.25) ... (-1.51) x 10-5
Transmission Range, microns 0.12 - 6.5
 

Thermal

Thermal Linear Expansion, °C-1
for ±60 °C
(28.1 ... 34.8) x 10-6
Thermal Conductivity, W/(m * °C)
at 38 °C
14.2
Specific Heat Capacity, J/(kg * °C) 1.5617 x 103
Melting Point, °C 870
 

Mechanical

Density, g/cm3 at 20 °C 2.60
Mohs Hardness 4
Vickers Microhardness, Pa 98 x 107
Constants of Elastic Compliance, Pa-1 S11 = 11.32 x 10-12
S12 = -3.06 x 10-12
S44 = 15.91 x 10-12
Young Modulus (E), Pa  
   in <100> direction 8.84 x 1010
   in <111> direction 14.22 x 1010
Shear Modulus (G), Pa  
   in <100> direction 4.09 x 1010
   in <111> direction 6.29 x 1010
Poisson Ratio 0.270
 

Chemical

Molecular Weight 25.94
Solubility
in water, gram/100 cm3 0.27
in acids soluble
 

Ref. Index vs. Wavelength l

Wavelength, Microns Refractive Index
0.2 1.439
0.5 1.3943
1.0 1.3871
2.0 1.3788
3.0 1.3666
4.0 1.3494
5.0 1.3266
6.0 1.2975
7.0 1.262
8.0 1.218
9.0 1.165
10.0 1.101
 

Internal Transmittance t i (l) vs. Wavelength l

Wavelength, Microns Internal Transmittance
0.2 0.90
0.5 0.98
1.0 0.97
3.0 0.97
5.0 0.88
6.0 0.65
7.0 0.14

Custom sizes and specifications are available on request.
 

Overview of elements with access to our shop

1 18
H
2 13 14 15 16 17
He
Li Be B C
N
O
F
Ne
Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S
Cl
Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se
Br
Kr
Rb Sr Y Zr Nb Mo
Tc
Ru Rh Pd Ag Cd In Sn Sb Te I
Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi
Po
At
Ra
Fr
Ra
Ac
Ce Pr Nd
Pm
Sm Eu Gd Tb Dy Ho Er Tm Yb Lu


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