Germanium tetrabromide is the inorganic compound with the formula GeBr<sub>4</sub>. It is a colorless solid that melts near room temperature. It can be formed by treating solid germanium with bromine, or by treating a germanium-copper mixture with bromine:
From this reaction, GeBr<sub>4</sub> has a heat of formation of 83.3 kcal/mol.
The compound is liquid at 25 ðC, and forms an interlocking liquid structure. From room temperature down to âÂÂ60 ðC the structure takes on a cubic ñ form, whereas at lower temperatures it takes on a monoclinic ò form.