Calcium fluoride (CaF2)

Calcium fluoride (CaF₂) is an inorganic compound composed of calcium and fluorine atoms. It appears as a transparent or slightly cloudy crystalline solid that is highly resistant to heat and chemical reactions. CaF₂ is commonly used in optical applications, such as lenses and windows for lasers and telescopes, because it transmits ultraviolet to infrared light effectively. It naturally occurs as the mineral fluorite. Its properties make it valuable in industry for manufacturing lenses, windows, and as a flux in metallurgy. Calcium fluoride's stability and clarity are key to its wide range of technological and scientific uses.