Lithium Fluoride – LiF
lenses, windows, mirrors, filters and prisms
Lithium Fluoride – LiF is used for the maufacture of optical windows, lenses, prisms, x-ray monochromator plates, and refracting components in the vacuum ultraviolet, visible and infrared. Lithium Fluoride is attacked by atmospheric moisture and is sensitive to thermal shock.
Transmission Range | 0.11 – 9.0 µ |
Crystal Structure | Rock Salt |
Cleavage Plane | 100 |
Colour | colourless |
Density | 2.639 (25°) |
Melting Point (°) | 848 |
Reflection Loss | 4.4% (4µ) for 2 surfaces |
Solubility index | 0.27gm/100gm water 20°C |
Hardness (Knoop) | 102 – 113 |
Thermal Conductivity (cal/cm sec°C) | 2.7×10-2 (41°C) |
Thermal Expansion coefficient (/°C) | 37×10-6(0-100°C) |

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Whilst every effort has been made to verify all data provided, no responsibility can be accepted for its accuracy.