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1995 (1)
1990 (1)
1Author    T. Gressling, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kristallstruktur von Ce2(W 0 4)3 On the Crystal Structure of Ce2(W 0 4)3  
 Abstract    Single crystals of Ce2(W 0 4)3 have been prepared by crystallisation from molten mixtures of W 0 3 and C e 0 2. The compound shows m onoclinic symmetry, a = 7.813(4), b = 11.720(2), c = 11.586(3), ß = 109.36(3)°, Z = 4, and is isotypic to Eu2(W 0 4)3, but shows large differences of the atomic coordinates especially of oxygen. The crystal structure of Ce2(W 0 4)3 is charac­ terized by W (1)0 4 tetrahedra, square W (2)0 5 pyramids and a distorted capped trigonal prism of oxygen around cerium. The decrease o f the oxidation states of C e4+ or W6+ was proved by thermogravimetric and magnetic measurements as well as by calculations of the Coulomb terms of lattice energy. 
  Reference    Z. Naturforsch. 50b, 1513—1516 (1995); eingegangen am 25. Mai 1995 
  Published    1995 
  Keywords    Cerium, Tungsten, Oxygen, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1513.pdf 
 Identifier    ZNB-1995-50b-1513 
 Volume    50 
2Author    Horst-Dieter Försterling, Szilvia MurányiRequires cookie*
 Title    Contribution of Malonyl Radical Control in the Classical Belousov-Zhabotinsky Reaction  
 Abstract    In the original theory of the Belousov-Zhabotinsky reaction it is assumed that the oscillations are exclusively controlled by bromide ions. From uv/vls and ESR experiments on BZ systems started with Ce 4+ we conclude that malonyl radicals play an important role as additional intermediates. The experiments are in agreement with calculations based on the Radicalator model. 
  Reference    Z. Naturforsch. 45a, 1259—1266 (1990); received July 15 1990 
  Published    1990 
  Keywords    Belousov-Zhabotinsky reaction, Cerium, Malonic acid, Bromate, Bromide, Feedback, Malonyl radicals 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-1259.pdf 
 Identifier    ZNA-1990-45a-1259 
 Volume    45