Beryllium is a fairly soft metal that is brittle yet strong. It is used as a coating on X-

ray tubes because it is transparent to the X-ray range. It also has military and 

nuclear industry applications. Beryllium is available as metal and compounds with 

purities from 99% to 99.999% (ACS grade to ultra-high purity). Elemental or 

metallic forms include pellets, rod, wire and granules for evaporation source 

material purposes. Beryllium oxide is an insoluble source of beryllium available in 

powder and dense pellet form for such uses as optical coating and thin film 

applications. Beryllium fluoride is another insoluble form for uses in which oxygen 

is undesirable such as metallurgy, chemical and physical vapor deposition and in 

some optical coatings. Beryllium is also available in soluble forms including 

chlorides, nitrates and acetates. These compounds can be manufactured as 

solutions at specified stoichiometries.