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  • 11
    Electronic Resource
    Electronic Resource
    Protonic solid electrolytes: a single-crystal neutron diffraction study of ammonium–hydronium β''-alumina (1983)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 227-235 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768183002311
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  • 12
    Electronic Resource
    Electronic Resource
    Short-range-ordering in the Ba2+ ion distribution in Ba2+ β''-alumina at 295 K (1984)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 208-213 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768184001993
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  • 13
    Electronic Resource
    Electronic Resource
    Li+/Na+ β-alumina: a combined single-crystal neutron and X-ray diffraction study. Erratum (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 849-849 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Lists of atomic coordinates, anisotropic displacement parameters and structure factors have been deposited with the IUCr (Reference: AB0365) for this article [Edström, Gustafsson, Thomas & Farrington, Acta Cryst. B53, 631–638]. Copies may be obtained through The Managing Editor, International Union of Crystallography, 5 Abbey Square, Chester CH1 2HU, England.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768197099606
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  • 14
    Electronic Resource
    Electronic Resource
    The Sr2+ β''-alumina (1985)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 1700-1703 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270185009131
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  • 15
    Electronic Resource
    Electronic Resource
    Li+/Na+ β-Alumina: A Combined Single-Crystal Neutron and X-ray Diffraction Study (1997)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 631-638 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The crystal structure and ionic distribution in the conduction plane of the partially exchanged Na+ \beta-alumina system Li0.75Na0.47Al11O17.11 has been determined from single-crystal X-ray diffraction at 30 and 298 K, in combination with a single-crystal neutron diffraction study at 295 K. At 30 K the Li+ ions occupy two sites: one in (2/3, 1/3, 1/4) and one ∼1.0 Å out of the z = 1/4 conduction plane. The Na+ ions are also found in two sites, both in the conduction plane. At 298 K the Li+ ions are found in three sites; the same two sites as at 30 K, as well as at a third site between these two. The Na+ ions occupy the same sites as at 30 K. The combination of X-ray and neutron diffraction is used to resolve the distribution of Na+ and Li+ ions. The column O5 atom in the Al3—O5—Al3 bridge between the spinel blocks is found to be disordered. Charge compensation is achieved through a Frenkel defect of two interstitial Al atoms, one on either side of the conduction plane, together with an extra oxygen in the conduction plane. One such defect occurs, on average, in every 4.5 unit cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768197006629
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  • 16
    Electronic Resource
    Electronic Resource
    The Ca2+ distribution in Ca2+ β''-alumina (1984)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 1763-1766 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827018400946X
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  • 17
    Electronic Resource
    Electronic Resource
    Structure of lithium–sodium β -alumina by powder neutron diffraction (1979)
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 438-439 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Polycrystalline lithium-sodium /3-alumina, with the two alkali species present in roughly equal proportions, has been shown to be a very good conductor of lithium ions1. Although definitivesingle crystal measurements have not been reported, the conductivity at room temperature, as measured by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/278438a0
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  • 18
    Electronic Resource
    Electronic Resource
    The lanthanideβ″ aluminas (1983)
    Springer
    Applied physics 32 (1983), S. 159-161 
    Details
    ISSN: 1432-0630
    Keywords: 66.30 ; 61.70 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The entire sodium ion content of sodiumβ″ alumina (Na1.67Mg0.67Al10.33O17) can be replaced with a variety of lanthanide ions by simple diffusion reactions at moderate temperatures (500–700°C). Lanthanideβ″ alumina crystals are hard, clear, chemically stable, and have well-defined crystal structures. The fluorescence spectrum of Nd3+ inβ″ alumina is similar to that in YAG. The lifetime of the4 F 3/2 state of Nd3+ in completely-exchangedβ″ alumina (350μs at 1021 Nd3+ cm−3) is about 45% longer than in YAG (240μs at 1020Nd3+ cm−3). The lanthanideβ″ aluminas may be of considerable interest as new phosphor and laser host materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616612
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  • 19
    Electronic Resource
    Electronic Resource
    Poly(ethylene oxide) electrolytes containing mixed salts (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 31 (1993), S. 157-163 
    Details
    ISSN: 0887-6266
    Keywords: polyelectrolytes, PEO-based, conductivity enhancement by mixed salts in solutions of ; conductivity, ionic, of PEO-based polyelectrolytes, mixed-salt enhancement of ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: An unusual conductivity enhancement occurs in PEO-based ZnBr2/LiBr electrolytes of composition, [xZnBr2 + (1 - x)LiBr](PEO)16 with x = 0.00, 0.05, 0.50, 0.75, 1.00. The conductivity of the mixed-salt electrolytes is higher than that of either pure salt electrolyte. The highest conductivity, observed for x = 0.5, is two orders of magnitude higher than that of pure LiBr(PEO)16 and one order higher than ZnBr2(PEO)16. In contrast, the conductivity of mixed Mg (CIO4)2/LiCIO4 electrolytes, [xMg(CIO4)2 + (1 - x) LiCIO4](PEO)16 where x = 0.00, 0.20, 0.50, 0.80, 1.00, increases monotonically with the mole fraction of the higher conductivity component, LiCIO4(PEO)16. The conductivity and differential scanning calorimetry (DSC) results suggest that the conductivity enhancement in the ZnBr2/LiBr electrolytes results from a change in charge carrier type and concentration, whereas the conductivity change in the Mg(CIO4)2/LiCIO4 electrolytes arises from a change in the microscopic viscosity of the electrolytes. © 1993 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1993.090310204
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