[Element symbols]: Ge
[] Relative atomic mass: 72.64
Colour and status]: silver-white solid
[Density]: 5.35 g / cc
[Mp】: 938.25 ℃
Boiling Point]: 2833 ℃
Usage:Germanium "metal" (isolated germanium) is used as a semiconductor in transistors and various other electronic devices. Historically the first decade of semiconductor electronics was based entirely on germanium. Today, however, its production for use in semiconductor electronics is a small fraction (2%) of that of ultra-high purity silicon, which has largely replaced it. Presently, germanium's major end uses are in fibre-optic systems, infrared optics and in solar cell applications. Germanium compounds are also used for polymerization catalysts and have most recently found use in the production of nanowires. This element forms a large number of organometallic compounds, such as tetraethylgermane, which are useful in organometallic chemistry.