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  • 1
    ISSN: 0044-2313
    Keywords: Ternary Intermetallic Compounds ; Platinium ; Palladium ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Crystal Structures of the Compounds CaPtGa, CaPtIn and CaPd0.4Ga1.6The new compounds CaPtGa, CaPtIn and CaPd0.4Ga1.6 were prepared by heating appropriate mixtures of the elements under an Ar-atmosphere. The results of the structural analysis of single crystals by means of X-ray diffraction are given in the section „Inhaltsübersicht“. CaPtGa and CaPtIn are isotypic and form the TiNiSi type structure (Pnma), where the Pt-atoms have a distorted tetrahedral environment consisting of Ga- resp. In-atoms. CaPd0.4Ga1.6 crystallizes in the CeCu2-type structure (Imma), the Cu positions being statistically occupied by Pd- and Ga-atoms.
    Notes: Strukturuntersuchungen an den durch Erhitzen von Elementgemengen unter Argon hergestellten intermetallischen Verbindungen CaPtGa und CaPtIn zeigen, daß diese dem TiNiSi-Typ mit verzerrter Tetraederkoordination um die Pt-Atome entsprechen. Es liegt Raumgruppe Pnma (Nr. 62) mit den Gitterkonstanten für CaPtGa a = 7,184(1) Å, b = 4,429(1) Å, c = 7,595(1) Å und Z = 4 sowie für CaPtIn mit a = 7,280(1) Å, b = 4,372(1) Å, c = 8,356(1) Å und Z = 4 vor. Die Verbindung CaPd0,4Ga1,6 kristallisiert im CeCu2-Typ, bei der die Cu-Punktlagen statistisch von Ga- und Pd-Atomen besetzt sind. Die Strukturrechnung erfolgte in Imma (Nr. 72) mit a = 4,462(1) Å, b = 7,231(1) Å, c = 7,745(1) Å und Z = 4.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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