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2001 (2)
1Author    F. Da Silva3, L. Rycerz3, M. Gaune-Escard3Requires cookie*
 Title    Calorimetric Investigation of MC1-EuCI2 Melts (M = Na, K, Rb)  
 Abstract    The molar enthalpies of mixing (A mixH m) of MCl-EuCl2 (M = Na, K, Rb) liquid binary systems were measured at 1138 K over the whole composition range by direct calorimetry. A Calvet type calorimeter was used, and mixing of the two liquid components was achieved by the ampoule break-off technique under argon at atmospheric pressure. The enthalpy of mixing of these systems is negative over the whole composition range with a minimum of approximately -0.5, -3.5 and -4.5 kJ mol-1 for M = Na, K, Rb, respectively. The least-squares coefficients A, B, C in the equation A (kJ mol-1) = A + B x + C x 2, where A is an interaction parameter, are reported. From the trend observed in these MCl-EuCl2 systems it was possible to estimate the mixing enthalpy of the CsCl-EuCl2 system. In tro d u c tio n 
  Reference    Z. Naturforsch. 56a, 653—657 (2001); received August 1 2001 
  Published    2001 
  Keywords    Mixing Enthalpy, Europium Dichloride, Alkali Chlorides, Calvet Calorimeter 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0653.pdf 
 Identifier    ZNA-2001-56a-0653 
 Volume    56 
2Author    F. Da Silva3, L. Rycerza, M. Gaune-Escard3Requires cookie*
 Title    Thermodynamic Properties of EuC12 and the NaCl-EuCl2 System  
 Abstract    The temperature and enthalpy of the phase transition and fusion of EuC12 were determined and found to be 1014 K, 11.5 kJ mol-and 1125 K, 18.7 kJ mol-1 , respectively. Addition­ ally, the heat capacity of solid EuC12 was measured by Differential Scanning Calorimetry in the temperature range 306 -1085 K. The results were fitted to the linear equation C^ m = (68.27 + 0.0255 T/K) J m ol-1 K-1 in the temperature range 306 -900 K. Due to discrepancies in the liter­ ature on the temperature of fusion of EuC12, the determination of the NaCl-EuCl2 phase diagram was repeated. It consists of a simple eutectic equilibrium at Tem = 847 K with x(EuCl2) = 0.49. 
  Reference    Z. Naturforsch. 56a, 647—652 (2001); received August 1 2001 
  Published    2001 
  Keywords    Europium Dichloride, Sodium Chloride, Phase Diagram, Enthalpy of Transition, Heat Capacity 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0647.pdf 
 Identifier    ZNA-2001-56a-0647 
 Volume    56