Structures and magnetic properties of solid solutions Ba₃Nd(Ru_1-xIr_x)₂O₉ (0 ≦ x ≦ 1.0) have been investigated. X-ray diffraction measurements show that Ba₃NdRu₂O₉ (corresponding to x = 0) is hexagonal with space group P6₃/mmc. On the other hand, Ba₃NdIr₂O₉ (x = 1.0) is monoclinic with space group C2/c. At an ambient temperature, the structures of Ba₃Nd(Ru_1-xIr_x)₂O₉ change from hexagonal to monoclinic symmetry above x = 0.8. With increasing temperature, the monoclinic Ba₃NdIr₂O₉ transforms to the hexagonal structure at 333 K. Magnetic susceptibility and specific heat measurements show that the x = 0 and x = 1.0 compounds are ferromagnetic below 24 and 17.4 K, respectively. Ferromagnetic behavior has been observed for their solid solutions, and the ferromagnetic transition temperature for Ba₃Nd(Ru_1-xIr_x)₂O₉ solid solutions is the lowest at the intermediate composition x = 0.5.

结构和固体溶液的Ba的磁特性₃的Nd（RU _{1- X}铱_X）₂ Ô ₉（0≦  X  ≦1.0）进行了研究。X射线衍射测量表明，Ba ₃ NdRu ₂ O ₉（对应于x  = 0）为六边形，空间群为P 6 ₃ / mmc。另一方面，Ba ₃ NdIr ₂ O ₉（x  = 1.0）是单斜晶且空间群为C 2 / c。在环境温度下，Ba ₃ Nd（Ru _{1- x} Ir _x）₂ O _9的结构在x  = 0.8以上从六方对称变为单斜对称。随着温度的升高，单斜晶Ba ₃ NdIr ₂ O ₉在333 K处转变为六边形结构。磁化率和比热测量表明，x  = 0和x  = 1.0的化合物分别在24和17.4 K以下具有铁磁性。已经观察到它们的固溶体的铁磁行为，以及Ba ₃ Nd（Ru _1-在中间组成x  = 0.5时， _x Ir _x） ₂ O ₉固溶体最低。