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1998 (1)
1Author    C. Hennig, H. OppermannRequires cookie*
 Title    Thermische Zersetzung und Lösungskalorimetrie von Ammoniumneodymchloriden Thermal Decomposition and Solution Calorimetry of Ammonium Neodymium Chlorides  
 Abstract    The thermodynamical data of ammonium neodymium chlorides (NH4)2NdCl5 and NH4Nd2Cl7 were derived by the determination of their decomposition equilibria by total pres­ sure measurements. Moreover, solution calorimetry was applied. The enthalpies of formation of these phases were calculated from their heats of solution and from the enthalpies of formation and the heats of solution of NdCl3 and NH4C1. D ata by total pressure measurement: Z\H£((NH4)2NdCl5,f)298) = — 412,5 dh 3,6 kcal/mol; S°((NH4)2NdCl5 f 298) = 80,1 ± 5,8 cal/K m ol; Z\H£(NH4Nd2Cl7,f,298) = -579,5 ± 3,5 kcal/mol; S°(NH4Nd2Cl7,f,298) 101,8 ± 5,6 cal/K mol. D ata by solution calorim etry: 4H £(N dC l3;f,298) -251,2 ± 0,7 kcal/mol; /\H £((N H 4)2NdCl5,f,298) = -105,5 ± 1,0 kcal/mol; Z\Hß(NH4Nd2Cl7f 298) = -576,8 ± 1,7 kcal/mol. 
  Reference    Z. Naturforsch. 53b, 175—183 (1998); eingegangen am 16. Oktober 1997 
  Published    1998 
  Keywords    Ammonium Neodymium Chlorides, Neodymium Chloride, Thermodynamical Data, Solution Calorimetry, Heat of Solution 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0175.pdf 
 Identifier    ZNB-1998-53b-0175 
 Volume    53