Sodium Fluoride ( NaF )
Crystal properties |
||
Crystal Type |
cubic |
|
Transmission Range |
< 0.15 ... 15 µm |
|
Refractive Index |
1.233 @ 10.3 µm |
|
Reflective Loss |
3.6 % @ 4.0 µm |
|
Reststrahlen |
35.8 µm |
|
Density. |
2.726 g/cm3 |
|
Melting Point |
980 °C / 997 °C |
|
Molecular Weight |
41.988 |
|
Thermal Conductivity |
3.746 W / (m K) |
|
Specific Heat |
1088 J / (kg K) @ 0 °C |
|
Thermal Expansion |
36 × 10–6 / K @ 25 °C |
|
Hardness (Knoop) |
60 |
|
Young’s Modulus |
64.79 GPa |
|
Shear Modulus |
55.14 GPa |
|
Bulk Modulus |
62.03 GPa |
|
Elastic Coefficient |
C11 = 90.9 / C12 = 26.4 / C44 = 12.7 GPa |
|
Dielectric Constant |
6.0 @ f = 2 MHz |
|
Solubility in Water |
4.22 g / 100 g @ 18 °C |
|
Cleavage Planes |
(100) |
|
Standard Diameter |
200 mm |
|
Application |
Cherenkov-counter |
|
Remarks: |
very low refractive index |