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  • Astronomy  (1)
  • Bismutoxideiodides  (1)
  • 1995-1999  (2)
  • 1960-1964
  • 1930-1934
  • 1925-1929
Collection
Publisher
Years
  • 1995-1999  (2)
  • 1960-1964
  • 1930-1934
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1945-1953 
    ISSN: 0044-2313
    Keywords: Bismutoxideiodides ; totale pressure measurements ; mass spectrometry ; thermodynamic data ; melting diagram ; barogram ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on the System Bi2O3/BiI3The temperature functions of decomposition pressures of the ternary compounds on the quasibinary line Bi2O3/BiI3 were determined by total pressure measurements and mass spectrometry. The barogram of the system was constructed and the melting diagram precised. The enthalpies of formation and the standard entropies of the solid phases were derived from the decomposition functions: (Values see Inhaltsübersicht).
    Notes: Die Temperaturabhängigkeit der Zersetzungsdrücke der auf dem quasibinären Schnitt Bi2O3/BiI3 existierenden ternären Verbindungen wurde durch Gesamtdruckmessungen mit dem Membrannullmanometer und dem Massenspektrometer ermittelt. Das Zustandsbarogramm für das System wurde aufgestellt und das Zustandsdiagramm präzisiert. Unter Zugrundelegung der Zersetzungsgleichungen wurden die Standardbildungsenthalpien und Standardentropien der festen ternären Phasen hergeleitet: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{l} \Delta {\rm H}_{\rm B}^{\rm o} \,({\rm BiOI, f, 298) = - 268,1} \pm {\rm 6,3}\,{\rm kJ}\,{\rm mol}^{{\rm - 1}} \\ {\rm S}^ \circ \,({\rm BiOI, f, 298) = 116,9} \pm {\rm 7,1}\,{\rm J}\,{\rm mol}^{{\rm - 1}} \,{\rm K}^{{\rm - 1}} \\ \Delta {\rm H}_{\rm B}^{\rm o} \,({\rm Bi}_{\rm 4} {\rm O}_{\rm 5} {\rm I}_{\rm 2} {\rm, f, 298) = - 1148,8} \pm 20{\rm,9}\,{\rm kJ}\,{\rm mol}^{{\rm - 1}} \\ {\rm S}^ \circ \,({\rm Bi}_{\rm 4} {\rm O}_{\rm 5} {\rm I}_{\rm 2} {\rm, f, 298) = 367,1} \pm 25{\rm,1}\,{\rm J}\,{\rm mol}^{{\rm - 1}} \,{\rm K}^{{\rm - 1}} \\ \Delta {\rm H}_{\rm B}^{\rm o} \,({\rm Bi}_{\rm 7} {\rm O}_{\rm 9} {\rm I}_{\rm 3} {\rm, f, 298) = - 2022,5} \pm 34{\rm,3}\,{\rm kJ}\,{\rm mol}^{{\rm - 1}} \\ {\rm S}^ \circ \,({\rm Bi}_{\rm 7} {\rm O}_{\rm 9} {\rm I}_{\rm 3} {\rm, f, 298) = 619,8} \pm 41{\rm,0}\,\,{\rm J}\,{\rm mol}^{{\rm - 1}} \,{\rm K}^{{\rm - 1}} \\ \Delta {\rm H}_{\rm B}^{\rm o} \,({\rm Bi}_{\rm 5} {\rm O}_{\rm 7} {\rm I, f, 298) = - 1471,2} \pm 20{\rm,1}\,{\rm kJ}\,{\rm mol}^{{\rm - 1}} \\ {\rm S}^ \circ \,({\rm Bi}_{\rm 5} {\rm O}_{\rm 7} {\rm I, f, 298) = 385,3} \pm 24{\rm,3}\,{\rm J}\,{\rm mol}^{{\rm - 1}} \,{\rm K}^{{\rm - 1}} \\ \end{array} $$\end{document}.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2019-08-15
    Description: The ROSAT Deep Survey includes a complete sample of 50 X-ray sources with fluxes in the 0.5 - 2 keV band larger than 5.5 x 10(exp -15)erg/sq cm/s in the Lockman field (Hasinger et al., Paper 1). We have obtained deep broad-band CCD images of the field and spectra of many optical objects near the positions of the X-ray sources. We define systematically the process leading to the optical identifications of the X-ray sources. For this purpose, we introduce five identification (ID) classes that characterize the process in each case. Among the 50 X-ray sources, we identify 39 AGNs, 3 groups of galaxies, 1 galaxy and 3 galactic stars. Four X-ray sources remain unidentified so far; two of these objects may have an unusually large ratio of X-ray to optical flux.
    Keywords: Astronomy
    Type: ASTRO-PH/9709144 , Astronomy and Astrophysics (ISSN 0004-6361)
    Format: text
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