Germanium is a tetravalent metalloid element (atomic number 32) with electronic configuration [Ar]3d¹⁰4s²4p², occupying group 14 of the periodic table. It forms predominantly covalent bonds and exhibits semiconductor behavior with an indirect band gap of about 0.66 eV at 300 K, making it suitable for high-speed electronics, infrared optics, and detector technologies. In materials science and device physics, germanium is used in SiGe and Ge-on-Si heterostructures to engineer band structures, carrier mobilities, and strain states. Its chemistry features oxidation states primarily of +2 and +4, enabling formation of organogermanium compounds, oxides, and halides relevant to synthesis and thin-film deposition.
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