Magnesium Fluoride – MgF2
lenses, windows, mirrors, filters and prisms
Magnesium Fluoride is a very durable material, resistant to mechanical and thermal shock and used for prisms, windows and lenses from the vacuum ultraviolet to the infrared region of 7.5 microns. MgF² is a birefringent material making it effective as a polarising element in the ultraviolet region.
| Transmission Range | 0.11 – 7.5 µ |
| Crystal Structure | Tin oxide |
| Cleavage Plane | Parellel to A or C axis |
| Colour | colourless |
| Density | 3.1766 (18°) |
| Melting Point (°) | 1255 |
| Reflection Loss | 4.8% (visible) for 2 surfaces |
| Solubility index | 0.0076gm/100gm water / 18°C |
| Hardness (Knoop) | 415kg/mm2 |
| Thermal Conductivity (cal/cm sec°C) | 0.3W (m K) at (13°C) |
| Thermal Expansion coefficient (/°C) | 18.8×10-6(Parellel to C axis) 1.31×10-6(Vertical to C axis) |
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Whilst every effort has been made to verify all data provided, no responsibility can be accepted for its accuracy.