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  • Chemistry  (1)
  • Oxide spinels  (1)
  • 1
    ISSN: 0022-3697
    Keywords: Oxide spinels ; cationic distribution ; neutron diffraction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 354 (1967), S. 307-312 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Mössbauer spectra of H2SnCl6 · 6 H2O, K2SnCl6, (NH4)2SnCl6, MgSnCl6 · 6 H2O, CaSnCl6 · 6 H2O and NiSnCl6 · 6 H2O have been determined at 77°K. Isomeric shifts with respect to the resonance line of SnO2 have been found to range between (0.46 - 0.49) ± 0.06 mm/sec. The dependence of the width at half-maximum of the resonance lines upon the thickness of the absorber has been studied at 77°K. On the basis of the data obtained it is assumed that widening of the resonance lines is caused by quadrupole interaction.The temperature dependence of the resonance effect has been investigated on the above compounds. The character of this dependence supports the conception about a correlation between the weak temperature dependence of the probability (f′) for recoilfree γ-quanta absorption and the low melting point of some tin compounds.
    Notes: Die Mössbauer-Spektren von H2SnCl6 · 6 H2O, K2SnCl6, (NH4)2SnCl6, MgSnCl6 · 6 H2O, CaSnCl6 · 6 H2O und NiSnCl6 · 6 H2O wurden bei 77°K aufgenommen. Die Isomerieverschiebungen (gegenüber der SnO2-Linie) liegen im Intervall zwischen (0,46-0,49) ± 0,06 mm/Sek. Die Abhängigkeit der Halbmaximumbreite der Resonanzlinien von der Absorberdicke wurde bei einer Temperatur von 77°K untersucht. Die experimentellen Daten lassen vermuten, daß die Resonanzlinien unter dem Einfluß einer Quadrupolwechselwirkung verbreitert sind.Die Temperaturabhängigkeit der Größe des Resonanzeffektes wurde bei obigen Verbindungen verfolgt. Der Charakter dieser Abhängigkeit unterstützt die Auffassung von einem Zusammenhang zwischen der schwachen Temperaturabhängigkeit der Wahrscheinlichkeit (f′) einer rückstoßfreien Absorption von γ-Quanten und dem niedrigen Schmelzpunkt mancher Zinnverbindungen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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