Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Complexes in Polyvalent Metal - Alkali Halide Melts (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 73-75 (Jan. 1991), p. 11-18 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/20/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.73-75.11.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effective interactions between concentration fluctuations and charge transfer in chemically ordering liquid alloys (1993)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 15 (1993), S. 393-398 
    Details
    ISSN: 0392-6737
    Keywords: Statistical theories of liquid structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The correlations between long-wavelength fluctuations of concentration in a liquid binary alloy are determined by a balance between an elastic-strain free energy and an Ornstein-Zernike effective interaction. The latter is extracted from thermodynamic data in the case of the Li−Pb system, which is well known to chemically order with stoichiometric composition corresponding to Li4Pb. Strong attractive interactions between concentration fluctuations near the composition of chemical ordering originate from electronic charge transfer, which is estimated from the electron-ion partial structure factors as functions of composition in the liquid alloy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02456921
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A model for the metal-non-metal transition in metal-molten-salt solutions (1994)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 307-310 
    Details
    ISSN: 0392-6737
    Keywords: Metal-insulator transitions ; Molten salts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We outline a theory for the metal-non-metal transition occurring in solutions of alkali metals in molten alkali halides as governed by a balance between the binding of ionic clusters by localized electrons and the excess free energy of an ionic assembly screened by metallic electrons. In the model the transition is driven by the composition dependence of the screening length. The theory is amenable to an analytic solution within the mean spherical approximation when Thomas-Fermi screening is used and the ions are described by charged hard spheres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02463782
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Electron localization and the non-metal-metal transition in alkali-alkali-halide solutions (1996)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 18 (1996), S. 613-620 
    Details
    ISSN: 0392-6737
    Keywords: Metal-insulator transitions ; Molten salts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We evaluate and extend an earlier proposal for a microscopic theory of the non-metal-to-metal (NM-M) transition which occurs on dissolving an alkali metal in it molten halide. The transition is viewed as involving a balance between the free-energy gain from the binding of valence electrons into localization centres and the excess free energy of the ionic assembly screened by the electrons. Using parameters estimated for solutions of potassium in potassium chloride and assuming that the elementary process of electronic trapping is the formation ofF-centre-like clusters, Thomas-Fermi screening by metallic electrons is shown to lead to a very sharp NM-M transition at a concentration in the range of 25–30% added metal. Thermally activated hopping of the localized electrons and the evolution of the localization centres with composition are next crudely taken into account by allowing for an additional contribution to the inverse screening length, which is estimated from the electronic localization length. This is shown to lead to a progressive break-up of the localization clusters, accelerating into a NM-M transition in the same concentration range. This simplified theoretical scenario is consistent with the available experimental evidence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453252
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Charged-soft-sphere potentials for trivalent metal halides (1992)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 14 (1992), S. 87-97 
    Details
    ISSN: 0392-6737
    Keywords: Studies of specific liquid structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Octahedral-type coordination by halogens in the liquid state has been reported for a number of trivalent metal ions from diffraction and Raman scattering experiments on their molten trihalides and from Raman scattering spectroscopy of liquid mixtures of trihalides with alkali halides. We analyse the available data on bond lengths and Raman frequencies by treating an isolated (MX6)3− species within a model which adopts charged-soft-sphere interionic potentials supplemented by an account of ionic polarization. The trivalent metal ions that we consider are M=La, Ce, Pr, Nd, Sm, Gd, Dy and Y for X=Cl and M=Al for X=F. The main result of the analysis is the prediction of trends in the soft-sphere repulsive parameters for the trivalent metal ions, leading to estimates of all the vibrational frequencies and the binding energy of such octahedral species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02455347
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...