Germanium(II) oxide, often represented by the chemical formula GeO, is a chemical compound composed of germanium (Ge) cations with a +2 oxidation state and oxygen (O) anions. However, germanium more commonly forms compounds in which it has a +4 oxidation state.

Germanium(II) oxide is relatively uncommon and not as well-studied as other germanium compounds. The +2 oxidation state of germanium is less common and less stable than the +4 oxidation state. As a result, germanium(II) compounds might be more reactive and less prevalent in chemical reactions and applications.

Because germanium(II) oxide is not commonly encountered, specific properties, applications, and research involving this compound might be limited. If you’re interested in germanium compounds, it’s more common to focus on compounds where germanium has an oxidation state of +4, which have wider applications and research associated with them.