Curium(III) chloride
Curium(III) chloride is the chemical compound with the formula CmCl3. Structure 
Curium(III) chloride has a 9 coordinate tricapped trigonal prismatic geometry. Synthesis
 A reaction of hydrogen chloride gas with curium dioxide, curium(III) oxide, or curium(III) oxychloride at a temperature of 400-600 °C:

 Dissolution of metallic curium in dilute hydrochloric acid:

This method has a number of disadvantages associated with the ongoing processes of hydrolysis and hydration of the resulting compound in an aqueous solution. Thus, it is problematic to obtain a pure product using this reaction. Preparation 
Curium(III) chloride can be prepared by the reaction of curium nitride with cadmium chloride. References 

Curium compounds
Nuclear materials
Chlorides
Actinide halides