Plutonium(III) bromide is an inorganic salt of bromine and plutonium with the formula PuBr<sub>3</sub>. This radioactive green solid has few uses, however its crystal structure is often used as a structural archetype in crystallography.
The PuBr<sub>3</sub> crystal structure was first published in 1948 by William Houlder Zachariasen. The compound forms orthorhombic crystals, a type of square antiprism, within which the Pu atoms adopt an 8-coordinate bicapped trigonal prismatic arrangement. Its Pearson symbol is oS16 with the corresponding space group No. 63 (in International Union of Crystallography classification) or Cmcm (in HermannâÂÂMauguin notation).