How is Indium tribromide (CAS: 13465-09-3) typically synthesized?

Indium tribromide (CAS: 13465-09-3) is typically synthesized by the direct reaction of indium metal with bromine gas. The reaction is exothermic and requires careful control of temperature and pressure. Commonly, this synthesis is carried out using a mixture of indium and bromine in a suitable container to achieve a high yield of the product.