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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 473 (1981), S. 178-188 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Ruthenium perovskites of type Ba2BRuO6 and Ba3BRu2O9 with B = Indium, RhodiumThe black perovskites Ba2InRu5+O6 and Ba3InRu2O9 (mean oxydation state of ruthenium: +4.5) adopt the hexagonal BaTiO3 structure and form a continuous series of mixed crystals. According to the intensity calculations and analysis of the vibrational spectroscopic data an ordered distribution between indium and ruthenium is present: 1:1 order in Ba2InRuO6 (space group P3m1 ≙ D3d3; R′ = 5.3%); 1:2 order in Ba3InRu2O9 (space group P63/mmc ≙ D6h4; R′ = 4.6%).The corresponding black Rh compounds, Ba2RhRuO6 and Ba3RhRu2O9, crystallize in the rhombohedral 9 L type of BaRuO3.
    Notes: Die schwarzen Perowskite Ba2InRu5+O6 und Ba3InRu2O9 (mittlere Ru-Wertigkeit: +4,5) kristallisieren jeweils im hexagonalen BaTiO3-Typ und bilden eine lückenlose Mischkristallreihe. Nach Intensitätsberechnungen und Analyse der schwingungsspektroskopischen Daten liegt zwischen Indium und Ruthenium eine geordnete Verteilung vor: 1:1 Ordnung in Ba2InRuO6 (R.G. P3m1 ≙ D3d3; R′ = 5,3%); 1:2 Ordnung in Ba3InRu2O9 (R.G. P63/mmc ≙ D6h4; R′ = 4,6%).Die entsprechenden, ebenfalls schwarzen Rh-Verbindungen, Ba2RhRuO6 und Ba3RhRu2O9, kristallisieren im rhomboedrischen 9 L-Typ von BaRuO3.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Mixed Valent Perovskites Ba3B3+Ru24,5+O9 - Catalytic Activity of Perovskite Oxides with Noble MetalsThe black compounds Ba3B3+Ru2O9 crystallize with B3+ = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Y in a hexagonal BaTiO3 structure (6 L, sequence (hcc)2) with an ordered distribution (1:2 order) of B3+ and ruthenium (BO6 single octahedra; Ru2O9 double groups). The mean oxidation state of ruthenium is about +4.5. The properties are compared with that of other isotypic stacking polytypes Ba3B3+M24,5O9 (M2 = IrRu, Ir2, PtRu) and Ba3B2+M25+O9 (M = Ru, Ir).The results of activity tests concerning the efficiency of perovskite oxides with noble metals in respect of the oxidation of CO or CHx and the reduction of NOx are reported.
    Notes: Die schwarzen Verbindungen Ba3B3+Ru2O9 kristallisieren für B3+ = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, und Y in einer hexagonalen BaTiO3-Struktur (6 L; Sequenz (hcc)2) mit geordneter Verteilung (1:2 Ordnung) von B3+ und Ruthenium (BO6-Einzeloktaeder; Ru2O9-Doppelgruppen). Die mittlere Wertigkeit des Rutheniums liegt stets bei +4,5. Die Eigenschaften werden mit denjenigen anderer isotyper Stapelvarianten Ba3B3+M24,5+O9 (M2 = IrRu, Ir2 und PtRu) sowie Ba3B2+M25+O9 (M = Ru, Ir) verglichen.Die Ergebnisse von Aktivitäts-Tests über die Wirksamkeit von edelmetallhaltigen Sauerstoffperowskiten bei der Oxydation von CO bzw. CHx sowie der Reduktion von NOx werden mitgeteilt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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