Magnesium fluoride is an inorganic compound with the formula MgF2. The compound is a white crystalline salt and is transparent over a wide range of wavelengths, with commercial uses in optics that are also used in space telescopes. It occurs naturally as the rare mineral sellaite.
M 1257 (OTTO) Magnesium fluoride, spezial, 99% Cas 7783-40-6 - used in ceramics, optical lenses, glass manufacturing, and single crystals for polarizing prisms. It is also used in organic synthesis.