LiF crystal or lithium fluoride crystal is an optical material with outstanding transmittance in VUV region. It is applicable for making optical windows, prisms and lenses in visible and IR spectrum regions.
Being sensitive to thermal shock, LiF crystals may be attacked by atmospheric moisture at a temperature of 400°C. Hence, users should take measures to protect LiF crystals from moisture and high energy radiation damages.
When working at a high temperature of 600°C, the LiF crystal softens and is slightly plastic, so it can be bent into radius plates.
We at JIEPU TREND mainly produce LiF crystals grown by modified Bridgman Technique, which makes our window crystals have high quality and good structure.
Properties of LiF Crystal
| Density | 2.64g/cm3 |
| Melting Point | 870℃ |
| Molar Mass | 25.9394 |
| Lattice Parameters | 4.0279 Å |
| Thermal Conductivity | 4.01 W/(m K) |
| Specific Heat | 1562 (J kg-1 K-1) |
| Thermal Expansion Coefficient | 28.1 - 34.8 (10-6/K) |
| Knoop Hardness | 102–103kg/mm2 |
| Mohs Hardness | 3 |
| Young's Modulus | 64.79 GPa |
| Shear Modulus | 55.14 GPa |
| Bulk Modulus | 62.03 GPa |
| Rupture Modulus | 10.8 MPa |
| Elastic Coefficient | C11 = 112 / C12 = 45.6 / C44 = 3.2 GPa |
| Crystal Type | Fm3m, cubic, NaCl type structure |
| Dielectric Constant | 9.0 @ 25 °C, f = 100...109 Hz |
| Solubility in Water | 0.27 (g/100 cm3) @ 18 °C |
| Application | VUV, DUV |
We are one of the LiF crystal manufacturers and suppliers based in China. In addition to different types of window crystals, we can also produce laser crystals, diffucsion bonding crystals, NLO crystals, and more. If you have any need, please don't hesitate to contact us. Your orders and inquiries are warmly welcomed. Thanks.
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