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)
Magnesium Fluoride (MgF2) windows and Magnesium Fluoride (MgF2) lenses

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