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**Symbol:** Ge
**Atomic number:** 32
**International title:** germanium
**Relative Atomic Weight:** 72,59
**Information:** Germanium is a rare, glossy gray-white coloured element. In the liquid state it behaves like metal.
**Use:** Silicon germanium SiGe is used to produce semiconductors. It is also used for the production of optical cables (germanium increases the material refractive index).
**Occurrence:** Germanium is very rare on Earth. It occurs as an additive in zinc and silver ores and in coal deposits.
**Structure:** Germanium crystallizes into a cubic (cubic) systems (surface-centered cell).
