![Germanium element card: symbol Ge, atomic number 32, atomic mass 72.630, electron configuration [Ar] 3d¹⁰ 4s² 4p², oxidation states +4 +2 -4, Metalloid, group 14, period 4, solid at room temperature.](https://stage.chemistry-dictionary.com/wp-content/uploads/2026/09/germanium-chemical-element.webp)
Germanium sits in group 14 of the periodic table, showing chemical behavior similar to silicon and tin. The solid element forms a strong crystal structure that expands slightly when freezing into a solid. Water and silicon are among the very few other substances that display this structural property.
You will rarely find pure germanium in nature because it is widely scattered in trace amounts. Mining companies usually find it mixed into zinc ores, or they extract it from coal ash. In chemical compounds, germanium usually takes a stable +4 oxidation state under normal conditions.
However, scientists can also make less stable compounds with a +2 oxidation state in the laboratory. A common student misconception is that silicon has always been the main semiconductor for computer chips. In reality, the very first electrical transistors ever built relied entirely on high-purity germanium.
Germanium lets long infrared heat waves pass right through it, making it ideal for specialized lenses. It also moves electrons much faster than silicon does in many high-speed electrical circuits. Many modern solar cells use a thin layer of germanium to capture extra sunlight. This helps convert solar energy into electrical power with much higher efficiency than standard panels.