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

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

[6] Curium bromide is an ionic compound composed of Cm3+ and Br−, appearing as a colorless solid.

It is orthorhombic, with space group Cmcm (No.

[5] Its crystal structure is isostructural with plutonium(III) bromide.