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  • 1
    Digitale Medien
    Digitale Medien
    Structural studies on thorium(IV)-titriplex IV-interacted 13X zeolite (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 871-877 
    Details
    ISSN: 1572-8943
    Schlagwort(e): complexes ; zeolite
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract A new zeolite derivative has been prepared by interacting Th(IV) and complexone in HCl medium and neutralising with aqueous ammonia. The amorphous and siliceous derivative showed a total mass loss of 29.25% in TG for stepwise dehydration, dehydroxylation and decomposition. Heats of reaction were 1167.6 J g−1 at 88.7°C and 75.167 J g−1 at 492.5°C for loss of volatile components and decomposition respectively.29Si and27Al MAS NMR spectra as well as XRD data of the derivative before and after calcination indicate presence of both four-coordinated and six-coordinated Al in varying ratios and the total loss of crystallinity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01981821
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  • 2
    Digitale Medien
    Digitale Medien
    Size distribution of different types of sites in Abelian sandpile avalanches (1995)
    Springer
    The European physical journal 96 (1995), S. 571-575 
    Details
    ISSN: 1434-6036
    Schlagwort(e): 05.40 ; 05.60 ; 46.10 ; 64.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The avalanches in the Abelian sandpile model have a compact structure and consist of shells. The different shells consist solely of sites that have toppled a fixed number of times. For the outermost shell the number is one and increases successively by one from an outer shell to the next inner shell. In this paper, we determine the size-distribution exponents of various categories of sites: sites that have toppled at least once, at least twice, at least thrice, only once and only twice. A particular subclass of avalanches is identified which have no shell structure and consist solely of sites which have toppled only once. The size distribution exponent of this type of clusters is determined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01313858
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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