BeF

Beryllium fluoride (BeF₂) is an inorganic ceramic compound combining beryllium with fluorine, typically produced as a crystalline solid or glass. It is primarily investigated in nuclear fuel applications, optical systems, and specialized high-temperature environments where its thermal stability and neutron transparency are advantageous. BeF₂ is less common in mainstream engineering than oxides or nitrides due to beryllium's toxicity during processing and the material's limited availability, but it remains relevant in research contexts where its unique combination of properties—including low neutron absorption and chemical inertness—justifies its use despite handling constraints.