Détermination des paramètres des mailles élémentaires de composés definis des systèmes Pu–Cu, Pu–Ga–Cu, et Pu–Ga–Ni

Diffusion experiments involving Pu–Cu, PuGa–Cu and PuGa–Ni couples, have brought into evidence the binary compounds PuCu 2 and PuCu 4 , a ternary compound PuCu 3 with variable small amounts of gallium and the ternary compounds Pu 2 Ni 2 Ga and PuNiGa. The crystalline parameters of these compounds were determined by the Debye–Scherrer method using alloys obtained by direct processing. Powder X‐ray diffraction showed the isomorphism of PuCu 2 with CeCu 2 and that all the above compounds are orthorhombic.