Germanium like Gallium was an element predicted by Dimitri Mendeleev through his work on the periodic table looking at tin and silicon. It was discovered by Clemens Winkler in 1886 from a silver ore sample. It was named Germanium after its countries founder’s origin, Germany. Germanium being a semi-metal is crystalline and brittle but is also a semiconductor. Unlike most solids it also expands when it freezes. Germanium is used as a transistor due to its semiconducting ability and also used in building circuits. Germanium is not naturally occurring in the earth’s crust it is found in the ore Germanite. It is located in Group 14 and it has a melting point of 938°c and a boiling point of 2833°c being a solid at room temperature.
Widely used in semiconductors. It is a good semiconductor when combined with tiny amounts of phosphorus, arsenic, gallium, and antimony.
Obtained from refining copper, zinc and lead.