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'Mössbauer spectroscopy' in keywords Facet   Publication Year 1997  [X]
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1Author    Z. NaturforschRequires cookie*
 Title    Zinn(IV)  
 Abstract    Komplexe mit diaciden Azo(hydrazono)verbindungen. Kristallstruktur von Bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]zinn(IV) Tin(IV) Complexes with Diacidic Azo(hydrazono) Compounds. Crystal Structure of Bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]tin(IV) Wolfgang Banße3, Tin(IV) complexes of diacidic azo and hydrazono compounds were synthesized by the reaction of these ligands with SnCl2acac2 and SnCl2 • 2H20 , respectively. The complexes were further characterized by Mössbauer spectroscopy. For bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]tin(IV) force field calculations have been performed and the crystal structure was determined by X-ray analysis. 
  Reference    Z. Naturforsch. 52b, 237—242 (1997); eingegangen am 16. Oktober 1996 
  Published    1997 
  Keywords    Tin(I V) Complexes, Diacidic Azo Compounds, Mössbauer Spectroscopy, Molecular Mechanics Study, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0237.pdf 
 Identifier    ZNB-1997-52b-0237 
 Volume    52 
2Author    Giacomo Cao, Giorgio Concas, Anna Corrias, Roberto Orru ', Giorgio Paschina, Barbara Simoncini, Giorgio SpanoRequires cookie*
 Title    Investigation of the Reaction between Fe 2 0 3 and Al Accomplished by Ball Milling and Self-Propagating High-Temperature Techniques  
 Abstract    In this work we investigate the mechanism of product formation of the aluminothermic reaction of Fe 2 0 3 in the presence of A1 2 0 3 using Ball Milling and Self-propagating High-temperature techniques. Results obtained by experiments under either argon or air atmosphere are analysed by X-ray diffraction and Mössbauer spectroscopy, together with microstructure observations. It is shown that ball milling products are strongly affected by the kind of atmosphere, while self-propagating high-temperature ones are only weakly influenced. Reaction mechanisms taking place in these cases are proposed. While ball milling involves only solid state reactions, the formation of a melt occurs under self-propagating high-temperature conditions. 
  Reference    Z. Naturforsch. 52a, 539—549 (1997); received April 25 1997 
  Published    1997 
  Keywords    Aluminothermic reduction, Ball Milling, Self-propagating High-temperature Synthesis, Mössbauer spectroscopy, X-ray diffraction, Mechanism of reaction 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0539.pdf 
 Identifier    ZNA-1997-52a-0539 
 Volume    52