How is Gadolinium tribromide (CAS: 13818-75-2) typically synthesized?

Gadolinium tribromide can be synthesized by reacting gadolinium metal with bromine or by treating gadolinium oxide with bromine gas. The reaction is typically carried out in an inert atmosphere to prevent oxidation, with high purity products obtained through recrystallization. The process is optimized for high yield and selectivity.