Go toArchive
Browse byFacets
Bookbag ( 0 )
'Thermochemical Data' in keywords
Results  3 Items
Sorted by   
Publication Year
1998 (2)
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 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0696.pdf 
 Identifier    ZNB-1997-52b-0696 
 Volume    52 
2Author    H. Oppermann, M. Zhang, C. Hennig, HeinzDieter LutzRequires cookie*
 Title    Thermochemisches und kalorisches Verhalten von NdA^Cl^ Thermochemical and Calorical Behaviour of NdAl3C l12  
 Abstract    The thermodynamical data of solid and gaseous aluminium neodymium chloride have been obtained by determination of the decomposition equilibria (of solid) from total pressure mea­ surements and chemical transport reactions (gaseous). The melting diagram was determined by DTA. The enthalpy of formation of the solid phase was calculated from their heats of solution and from the enthalpies of formation and the heats of solution of NdCl3 and A1C13. Data by total pressure measurement: ^ H |(N d A l3Cl,2<f<298) = -749,6 ± 2,5 kcal/mol; S°(NdAl3C l12ifj298) = 118,2 ± 3,0 cal/K-mol. Data by solution calorimetry: zAHß(NdAl3C l|2 1298) = -748,6 ± 1,3 kcal/mol. Data by chemical transport: zAH£(NdAl3C l12>g,298) = -701,5 ± 3,0 kcal/mol; S°(NdAl3Cl12-g,298) = 215,0 ± 4,0 cal/K-mol. 
  Reference    Z. Naturforsch. 53b, 1343—1351 (1998); eingegangen am 21. Juli 1998 
  Published    1998 
  Keywords    Aluminium Neodymium Chloride, Decomposition, Thermochemical Data, Enthalpy, Entropy 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1343.pdf 
 Identifier    ZNB-1998-53b-1343 
 Volume    53 
3Author    U. Steiner, W. ReicheltRequires cookie*
 Title    Zum System Sr/Mo/O: Phasendiagramm, Synthese und Charakterisierung der ternären Verbindungen On the System Sr/Mo/O: Phase Diagram, Synthesis and Characterization of Ternary Compounds  
 Abstract    The phase diagram of the ternary system Sr/Mo/O has been determined at a temperature of 1000°C. Powder samples of the ternary compounds SrM o04, Sr3M o06, SrM o03, Sr2M o04 and SrMo50 8 were prepared by solid state reactions. The thermochemical data of all ternary compounds were determined.oA new compound, Sr3Mo20 7, with a layered perovskite structure (a = 3.967(1), c = 20.588(5) A, I4/mmm) was found. Rietveld analysis based on powder X-ray diffraction data confirms that the compound Sr2M o04 has the K7NiF4 structure (I4/mmm) with a = 3.9176(1), c = 12.8545(4) A. 
  Reference    (Z. Naturforsch. 53b, 110—116 [1998]; eingegangen am 10. Oktober 1997) 
  Published    1998 
  Keywords    Strontium Molybdate, Phase Diagram, Synthesis, Thermochemical Data, Electric Properties 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0110.pdf 
 Identifier    ZNB-1998-53b-0110 
 Volume    53