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 5735 (OTTO) Magnesium fluoride pieces, 1-8 mm, 99.9%+ Cas 7783-40-6 - used as Vacuum deposition, anti-reflective coatings, in optics and also used in space telescopes, glass industry and ceramics.