Calcium fluoride (CaF2) crystal has a wide light transmission range (good light transmission performance in the wavelength range of 0.13μm~10μm), low stress birefringence (no obvious intrinsic birefringence above 200nm), uniform refractive index, stable mechanical properties, non-deliquescent, and strong against radiation damage. It is an ideal material for making various optical windows, prisms and lenses.
| Main Property Parameters | |
| Crystal System | Cubic |
| Density | 3.18（g/cm3） |
| Melt Point | 1360℃ |
| Refractive Index | 1.39908 at 5um |
| Solubility | 0.0017g/100cm（20℃∕water） |
| Transmit Wavelengths | 0.13~11.3μm |
| Kjeldahl Hardness | 158.3（100） |
| Elasticity Coefficient | C11=164、C12=53、C44=33.7 |
| Apparent Elastic Limit | 36.54MPa |
| Thermal Expansion | 18.85×10-6∕℃ |
| Crystal Direction | <100>、<001>、<111>±0.5º |
| Dimension（mm） | 10x10，20x20，30x30mm，Ø50.8，Ø76.2 ，Ø100mm |
| Polishing | One side or two sides |
| Packaging | Clean bag (100), Super clean room (1000) |
