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Single crystals of Ag 0.4 Na 2.3 Ca 4.3 RuO 8  have been prepared by heating Na 2 O 2 , CaO and ruthenium in closed silver tubes. Silver took part in the reaction. The crystal structure was investigated by X-ray techniques. AgO 4 Na 2.3 Ca 4.3 RuO 8  crystallizes with orthorhombic symmetry, space group D 19  2h -Cmmm ; a = 9.255(1), b = 6.683(1), c = 6.696(3) Å , Z = 2. It shows relations to the sodium chloride structure. A statistical distribution of Ag +  and Na +  can be separated in micro space by splitting one oxygen position to give a dumb-bell like O-Ag-O and an octahedral NaO 6  coordination.

Eine silberhaltige Phase eines Oxoruthenats: Ag 0,4 (Na 2,3 Ca 4,3 RuO 8 / A Silver Containing Phase of an Oxoruthenate: Ag 0,4 Na 2,3 Ca 4,3 RuO 8