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  • Chemistry  (1)
  • chromatographic effect  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Reaction kinetics and catalysis letters 63 (1998), S. 283-289 
    ISSN: 1588-2837
    Keywords: copper-manganese formates ; γ-Al2O3 impregnation ; chromatographic effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A strong chromatographic effect has been established during copper-managenese formate impregnation of γ-Al2O3. The samples obtained have been characterized by adsorption, IR, X-ray and magnetochemistry methods.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Über die magnetischen Eigenschaften und die Phasenzusammensetzung des Systems Cr2O3—MnOx (2 ≥ x ≥ 1,5)Das Mischoxidsystem Cr2O3—MnOx (2 ≥ x ≥ 1,5) wurde durch Röntgenbeugung, Messung der magnetischen Suszeptibilität und chemische Bestimmung des Überschuß-Sauerstoff(BUNSEN-Methode) untersucht. Es wurden verschiedene Phasen, nämlich die antiferromagnetischen Oxide Cr2O3, β-MnO2, α-Mn2O3 und die ferromagnetische Phase Cr1-yMnyO2 gefunden. Die Bildung der letzteren Phase mit vierwertigem Chrom wird durch einen Gitterinduktionseffekt des MnO2 (Rutil-Typ) erklärt.
    Notes: The mixed oxide system Cr2O3—MnOx (2 ≥ x ≥ 1.5) was investigated by X-ray diffraction, by measurements of magnetic susceptibility, and by chemical determination of excess oxygen (BUNSEN'S method). The Presence of the antiferromagnetic oxides Cr2O3, β-MnO2, α-Mn2O3 and a ferromagnetic phase Cr1-yMnyO2 was stated. The formation of the latter with fourvalent chromium is explained by a lattice induction effect of the MnO2 (rutile type).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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