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  • Articles: DFG German National Licenses  (1)
  • 1995-1999  (1)
  • Chemistry  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1721-1728 
    ISSN: 0044-2313
    Keywords: Sn1-xAuxF4 ; Preparation ; Magnetic Behaviour ; EPR-, ENDOR-, Mössbauer-Spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Green Paramagnetic Gold Fluoride - Sn1-xAuxF4?Green single crystals were obtained by heating (Au-tube, 450° - 500°C) a mixture of SnF2 and AuF3 (Sn : Au = 1 : 1) which correspond to the SnF4-type [2, 3] (two single crystals, A: 762 Io, R1 = 2.4%; B: 1591 Io, R1 = 1.2% (SHELXL-93); I4/mmm (No. 139); B: a = 404.8(1) pm, c = 796.4(1) pm, c/a = 1.97, ZF2 = 0.2354). Due to atom absorption and Mössbauer measurements the crystals contain Au. The compound is paramagnetic and follows the Curie-Weiß law (14.7-251.3 K, θ = -12 K, μ/μB = 1.55). ESR-experiments confirm that Au is surrounded by 6 F- according to Sn in SnF4 (2 short (187.5 pm) and 4 longer (202.4 pm) distances). The observed Mössbauer spectra could not be interpreted yet, but they don't correspond to any known.
    Notes: Flaschengrüne Einkristalle entstehen beim Erhitzen (Au-Rohr, 450° - 500°C) inniger Gemenge von SnF2 und AuF3 (Sn : Au = 1 : 1), welche dem SnF4-Typ [2,3] entsprechen (zwei Kristalle, A: 762 Io, R1 = 2,4%; B: 1591 Io, R1 = 1,2% (SHELXL-93); I4/mmm (Nr. 139); B: a = 404,8(1) pm, c = 796,4(1) pm, c/a = 1,97, ZF2 = 0,2354). Atomabsorptionsspektroskopie sowie Mössbauer-Messungen bestätigen das Vorliegen von Au im Wirtsgitter. Die Verbindung ist paramagnetisch (Curie-Weiß-Gesetz (14,7-251,3 K) mit θ = -12 K, μ/μB = 1,55). ESR-Messungen bestätigen, daß die Umgebung von Au der von Sn in SnF4 entspricht (2 kurze (187,5 pm) und 4 längere (202,4 pm) Abstände d(Sn—F)). Die Interpretation der Mössbauer-Spektren ist schwierig. Vergleichbare Spektren wurden bislang nicht beobachtet.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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