Zur Struktur von Ba3SmRu2O9, Ba3SmIrRuO9 und Ba2InIrO6

On the Structure of Ba₃SmRu₂O₉, Ba₃SmIrRuO₉, and Ba₂InIrO₆ The compounds Ba₃SmRu₂O₉, Ba₃SmIrRuO₉, and Ba₂InIrO₆ have a hexagonal BaTiO₃ structure (sequence (hcc)₂) with an ordered cationic distribution. The 6 L stacking polytypes Ba₃BM₂O₉ show an 1:2 order (M₂O₉ double octahedra and BO₆ single groups) and crystallize in the space group P6₃/mmc. The refined, intensity related R′ values are 6.9% (Ba₃SmRu₂O₉) and 6.5% (Ba₃SmIrRuO₉). The 1:1 ordered Ba₂InIrO₆, with InIrO₉ double groups and InO₆^?, IrO₆-single octahedra, belongs to the space group P3 m1; the refined R′ is 7,3%.