Curium(III) bromide

Curium(III) bromide is the bromide salt of curium. It has an orthorhombic crystal structure.

Preparation
Curium bromide can be produced by reacting curium chloride and ammonium bromide in a hydrogen atmosphere at 400–450 °C.


 * CmCl3 + 3NH4Br -> CmBr3 + 3 NH4Cl

It can also be produced by reacting curium(III) oxide and hydrobromic acid at 600 °C.

Properties
Curium bromide is an ionic compound composed of Cm3+ and Br−, appearing as a colorless solid. It is orthorhombic, with space group Cmcm (No. 63) and lattice parameters a = 405 pm, b = 1266 pm and c = 912 pm. Its crystal structure is isostructural with plutonium(III) bromide.