Calcium Fluoride (
CaF2
)| Properties (CaF2) | |
| Transmission Range | 0.13 - 12 µm |
| Refractive Index | 1.501830 @0.193 µm; 1.40568 @4.4 µm |
| Reflective Loss | 5,6% @4 µm |
| Reststrahlen | 35 µm |
| Density | 3.18 g/cm3 |
| Melting Point | 1418°C |
| Molecular Weight | 78.08 |
| Thermal_Conductivity | 9.71 W/(m·K) |
| Specific Heat | 854 J/(kg·K) |
| Thermal Expansion | 18.87 - 20.16 (·10-6 /°C (25°C)) |
| Hardness (Mohs) | 158.3 |
| Mohshärte | 4 |
| Young`s Modulus | 75.8 GPa |
| Shear Modulus | 33.77 GPa |
| Bulk Modulus | 82.71 GPa |
| Rupture Modulus | 36.5 MPa |
| Elastic Coefficient | C11 = 164; C12 = 53; C44 = 33.7 GPa |
| Dielectric Constant | 6.76 @27°C f= 100kHz |
| Solubility in Water | 0.0017 g/100g @20°C |
| Type of Material | Single crystal, synthetic |
| Crystal Structure | Cubic, CaF2 type structure, Fluoride or Fluorite type structure, Fm3m Oh5, a0= 5,4623 Å |
| Cleavage Planes | {111} |
| Size of ingots | max. 200 mm ø |
| Application | The material is available in different quality levels (IR, UV, VUV-Laser-grade). Field of application is the IR analytic, astronomical- und camera lenses and optics for Excimer laser. In the doped version like CaF2:Eu it is used as a Scintillator . |
| Remarks | Material specifications: 1. Measurements of transmission (VUV/UV-VIS/IR) 2. Homogenity of Refractive Index 3. Stress-induced birefringence |
Transmission spectrum
Transmission spectrum-2
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This symbol denotes crystal grown in-house.