Germanium is a very important semiconductor and is also finding many other 

applications including use as an alloying agent, as a phosphor in High Purity 

(99.999%) Germanium Oxide (GeO2) Powderfluorescent lamps, and as a catalyst. 

Germanium and germanium oxide are transparent to the infrared and are used in 

infrared spectroscopes High Purity (99.99%) Germanium (Ge) Sputtering 

Targetand other optical equipment, including extremely sensitive infrared 

detectors. The high refractive index and dispersion properties of its oxides have 

made germanium useful as a component of wide-angle camera lenses and 

microscope objectives. Elemental or metallic forms of Germanium include pellets, 

rod, wire and granules for evaporation source material purposes. Germanium 

oxide is available in forms including powders and dense pellets for such uses as 

optical coating and thin film applications. Oxides tend to be insoluble. Fluorides 

are another insoluble form for uses in which oxygen is undesirable such as 

metallurgy, chemical and physical vapor deposition and in some optical coatings. 

Germanium is also available in soluble forms including chlorides, nitrates and 

acetates. These compounds can be manufactured as solutions at specified