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  • Electronic Resource  (13)
  • 1975-1979  (13)
  • Chemistry  (13)
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  • Electronic Resource  (13)
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  • 11
    Electronic Resource
    Electronic Resource
    Über geordnete Perowskite mit Kationenfehlstellen Die Systeme Ba2MgWO6-Ba2Y0,67WO6 und Ba2CaWO6-Ba2Y0,67WO6 (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 431 (1977), S. 144-152 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Ordered Perovskites with Cationic Defects. The Systems Ba2MgWO6—Ba2Y0.67WO6 and Ba2CaWO6—Ba2Y0.67WO6The perovskites Ba2MgWO6 and Ba2CaWO6 show complete miscibility with Ba2Y0.67WO6. The mixed crystals have a cubic 1:1 ordered perovskite structure, whereas with x an increase of cationic defects is observed (systems Ba2B1-xIIY0.67x□0.33xWO6). Depending on the occupation of the neighbouring positions different types of WO6 octahedra are present. The transformation cubic → hexagonal, which is characteristic for Ba2Y0.67WO6, is oppressed by the incorporation of BII ions.
    Notes: Die Perowskite Ba2MgWO6 bzw. Ba2CaWO6 zeigen mit Ba2Y0,67WO6 vollständige Mischbarkeit. Die in einem kubischen 1:1 geordneten Perowskitigitter kristallisierenden Mischkristalle enthalten mit x steigende Mengen an Kationenfehlstellen (Systeme Ba2B1-xIIY0,67x □0,33xWO6). In Abhängigkeit von den Nachbarschaftsverhältnissen liegen verschiedene Typen an WO6-Oktaedern nebeneinander vor. Die für Ba2Y0,67WO6 charakteristische Umwandlung kubisch → hexagonal wird durch Einbau von BII-Ionen unterdrückt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774310114
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  • 12
    Electronic Resource
    Electronic Resource
    Schwingungsspektroskopische Untersuchungen an Perowskitvarianten Ba2B0,67III□0,33MVIO6 und ihren Mischkristallen mit Ba2BIIMVIO6 (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 197-202 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vibrational Spectroscopic Investigation on Perovskite Type Variants Ba2B0.67III□0.33MVIO6 and their Solid Solutions with Ba2BIIMVIO6In the perovskite typ variants Ba2B0.67III□0.33MVIO6 with MVI = W, U, Te several kinds of MVIO6 octahedra are to distinguish. The study of the solid solutions Ba2B1-xIIY0.67x□0.33xWO6 (BII = Mg, Ca) shows, that in the lattice no more than three different types of WO6 octahedra can be present.
    Notes: Die Perowskitvarianten Ba2B0,67III□0,33MVIO6 mit MVI = W, U, Te enthalten mehrere Sorten an MVIO6-Oktaedern. Aus der Untersuchung der Mischkristallsysteme Ba2B1-xIIY0,67x□0,33xWO6 (BII = Mg, Ca) geht hervor, daß im Gitter nicht mehr als drei verschiedene Typen von WO6-Oktaedern vorhanden sein können.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370128
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  • 13
    Electronic Resource
    Electronic Resource
    Über hexagonale Perowskite mit Kationenfehlstellen. VII. Schwingungsspektroskopische Untersuchungen an rhomboedrischen 12 L-Stapelvarianten vom Typ Ba4BII(Re2 □ O12) and Ba4B2/3III □1/3 (Re2 □ O12) (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 454 (1979), S. 49-62 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Hexagonal Perovskites with Cationic Vacancies. VII. Vibrational Spectroscopie investigations on the Rhombohedral 12 L-Stacking Polytypes Ba4BII(Re2□O12) and Ba4B2/3III □1/3 (Re2 □ O12)For the rhombohedral 12 L stacking polytypes Ba4BII(Re2□O12) and Ba4B2/3III□1/3(Re2□O 12), space group R3m, sequence (3)(1), the lattice consists of groups of three face sharing octahedra with the composition Re2□O12. They are isolated from each other by the Ba and B ions.The vibrational spectra are interpreted according to the factor group analysis.For the Re2□O12 unit (symmetry D3d) the results of a complete vibrational analysis and the calculation of the force constants are reported.
    Notes: Das Gitter der rhomboedrischen 12 L-Stapelvarianten Ba4BII(Re2□O12) und Ba4B2/3III□1/3(Re2 □O12), R.G. R3m, Stapelfolge (3)(1), besteht aus Dreierblöcken von flächenverknüpften Oktaedern der Zusammensetzung Re2□O12, die voneinander durch die Ba- und B-Ionen isoliert sind. Die Schwingungsspektren lassen sich entsprechend der Faktorgruppenanalyse zuordnen.Für die Re2□O12-Gruppe (Symmetrie D3d) wird eine vollständige Schwingungsanalyse sowie die Ergebnisse der Kraftkonstantenberechnung mitgeteilt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794540109
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    Paper (German National Licenses)
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