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  • 1995-1999  (2)
  • Crystal structures  (1)
  • Fracture  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Bui's path-independent integral in finite elasticity (1995)
    Springer
    Meccanica 30 (1995), S. 139-145 
    Details
    ISSN: 1572-9648
    Keywords: Elastostatics ; Conservation laws ; Fracture ; Mechanics of solids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Sommario Un integrale indipendente dal cammino intorno al vertice di una frattura in un campo di deformazione bi-dimensionale è stato stabilito da Bui. Tale integrale èduale all'integrale di Rice, nel senso che si basa sulla densità di energia complementare o degli sforzi. Qui si propone un integrale invariante in un continuo tridimensionale soggetto a deformazioni finite. Si mostra che il risultato di Bui segue come caseo particolare.
    Notes: Abstract A path-independent integral has been stated by Bui in the presence of a straight crack in a two-dimensional deformation field. Such an integral isdual to the Rice integral in the sense that it is based on the complementary stress energy density. Here we establish a boundary-independent integral in finite elasticity from which Bui's result follows as a particular case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990452
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis, X-ray Crystal Structure and Magnetism of [NiCl2{(bis(2-benzimidazolyl)propane}]2 · (C2H5OH)2 - A Second Example of a Ferromagnetically Coupled Five-Coordinated High-Spin Dichloro-Bridged Nickel(II) Dimer (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1337-1341 
    Details
    ISSN: 1434-1948
    Keywords: Crystal structures ; Nickel complexes ; Dinuclear complexes ; Magnetism ; Far-infrared ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The ligand bis(2-benzimidazolyl)propane coordinates to NiII with chloride as an anion, thereby forming a dinuclear compound with the formula: [NiCl2(tbz)2]2(C2H6O)2. This compound crystallizes in the space group P21/c. Each five-coordinated NiII ion has a distorted trigonal bipyramidal environment which consist of two asymmetrically bridging Cl anions with distances of 2.3556(17) and 2.4275(16) Å, a terminal Cl anion with a distance of 2.3496(17) Å and two nitrogen atoms of the ligand with distances of 2.022(4) and 2.000(4) Å. The Ni-Ni distance is 3.5891(12) Å, while the Ni-Cl-Ni angle is 97.23(6)°. The magnetic properties of the compound, as studied in the range 5-280 K, have been fitted with a zero-field splitting parameter D (-14.3 cm-1) and a ferromagnetic exchange between the Ni ions in the dinuclear unit (J = +2.5 cm-1). The title compound appears to be the second example for a five-coordinated ferromagnetic dinuclear NiII compound of this type, and its magnetic properties appear to correlate with the ligand structure. With the availability of an increasing number of examples of such species it appears that antiferromagnetic exchange is found for all cases with the chromophore N2ClNiCl2NiClN2 where the MN2 ring is 5-membered. In the case, where this ring is six-membered, the exchange is ferromagnetic.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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