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1997 (1)
1Author    A. M. Orgenstern, H. OppermannRequires cookie*
 Title    Untersuchungen zur thermischen Zersetzung von Ammoniumlanthanhalogeniden Investigation on the Thermal D ecom p osition o f A m m onium H alides  
 Abstract    The decomposition equilibria of Ammonium Lanthanum Halides (NH4)2LaX5 were determined by total pressure measurements in a membrane zero manometer. The phases (NH4j2LaX5 decompose in one step to give solid LaX3 and gaseous NH3 and HX. From the decomposition functions the enthalpies of formation and the standard entropies of the phases are derived. ^H £(N H 4)2LaCl5,f,298) = -4 1 1 ,7 ± 2,2 kcal/mol; S°((NH4)2LaCl5,f,298) = 86,7 ± 2,3cal/Kmol; ^H^(NH4)2LaBr5,f,298) = -351,6 ± 3,8 kcal/mol; S°((NH4)2LaBr5,f,298) = 101,1 ± 1,8 cal/Kmol; _}H£(NH4)2LaI"f,298) = -2 6 8 ,9 ± 3,9 kcal/mol; S°((NH4)2LaI5,f,298) = 115,5 ± 4,3 cal/Kmol. 
  Reference    Z. Naturforsch. 52b, 696—706 (1997); eingegangen am 17. Februar 1997 
  Published    1997 
  Keywords    Synthesis, Ammonium Lanthanum Halides, Thermal Decomposition, Thermochemical Data 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0696.pdf 
 Identifier    ZNB-1997-52b-0696 
 Volume    52