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  • Electronic Resource  (3)
  • 1975-1979  (3)
  • 1977  (3)
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  • Electronic Resource  (3)
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  • 1975-1979  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Über die Polymorphie der Perowskite Ba2SE0,67WVIO6. II. Die Systeme Ba2Nd0,67(1-x) Y0,67xWO6 und Ba2Nd0,67W1-xUxO6 (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 431 (1977), S. 134-143 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polymorphism of Perovskite Compounds Ba2SE0.67WVIO6. II. The Systems Ba2Nd0.67(1-x)Y0.67xWO6 and Ba2Nd0.67W1-xUxO6In the system Ba2Nd0.67(1-x)Y0.67xWO6 the formation of a continuous series of mixed crystals with cubic 1:1 ordered perovskite structure is observed. The existence of a hexagonal modification is confined to the Y-rich side (x ≥ 0,9). In the Ba2Nd0.67W1-xUxO6 series only for x ≤ 0,25 homogeneous cubic perovskites are obtained. In contrast to systems with other rare earths the Nd series show uncommon optical properties.
    Notes: Im System Ba2Nd0,67(1-x)Y0,67xWO6 wird die lückenlose Bildung von Mischkristallen mit kubischer 1:1 geordneter Perowskitstruktur beobachtet. Die Existenz einer hexagonalen Modifikation ist auf die Y-reiche Seite (x ≥ 0,9) beschränkt. In der Reihe Ba2Nd0,67W1-xUxO6 können einheitliche kubische Perowskite allein für x ≤ 0,25 erhalten werden. Im Gegensatz zu Systemen mit anderen Seltenen Erden zeichnen sich die Nd-Reihen durch ungewöhnliche optische Eigenschaften aus.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774310113
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    Paper (German National Licenses)
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  • 2
    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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    Paper (German National Licenses)
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  • 3
    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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    Paper (German National Licenses)
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