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  • Inorganic Chemistry  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 436 (1977), S. 105-112 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, Temperature Behaviour, and Crystal Structure of BiF3Orthorhombic BiF3 was prepared from BiOCl and HF at 300°C through elimination of oxygen. Thermal analysis showed no transformation up to the melting point of 757°C. The orthorhombic structure of BiF3 can, however, transform into the structure of Tysonit in presence of a small amount of oxygen. The single-crystal X-ray structure determination (553 reflexions, R = 0.050) demonstrated that BiF3 is isostructural with the rare-earth trifluorides of the YF3 type (Pnma). The coordination polyhedron around Bi can be described in terms of a slightly distorted square-antiprisma (CN = 8).
    Notes: Orthorhombisches BiF3 wurde aus BiOCl und Fluorwasserstoff bei 300°C unter Ausschluß von Sauerstoff dargestellt. BiF3 zeigt bis zum Schmelzpunkt bei 757°C keine Phasen-umwandlung. Die orthorhombische BiF3-Struktur kann durch sehr geringe Sauerstoffgehalte in die Tysonitstruktur umgewandelt werden. Die Einkristall-Röntgenstrukturanalyse (553 Reflexe, R = 0,050) ergab, daß BiF3 isotyp mit den Selten-Erd-Trifluoriden vom YF3-Typ (Pnma) ist. Die Koordinationsverhältnisse um Bi können mit Hilfe eines leicht verzerrten quadratischen Antiprismas (KZ = 8) beschrieben werden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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