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  • 1
    Electronic Resource
    Electronic Resource
    Crystal Structures of Fast Ion Conductors (1982)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Materials Research 12 (1982), S. 351-376 
    Details
    ISSN: 0084-6600
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ms.12.080182.002031
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  • 2
    Electronic Resource
    Electronic Resource
    Book reviews (1983)
    Springer
    Wood science and technology 17 (1983), S. 163-164 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369134
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  • 3
    Electronic Resource
    Electronic Resource
    Stiffening phenomena in annual rings of coniferous wood (1984)
    Springer
    Wood science and technology 18 (1984), S. 19-32 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The structure of coniferous wood is characterized by pronounced differences in density between earlywood and latewood. This could result in disadvantages in wood strength especially against bending. A summary of the observations in this paper leads to the following hypothesis: Coniferous trees meet this danger by forming numerous stiffenings especially in broad annual rings with a high percentage of earlywood. Such stiffenings may be produced by more or less slight fluctuations of density or chemistry within annual rings in radial as well as in tangential directions. The question remains open which anatomical or chemical reasons, upon sandblasting, locally cause radial or radially branched ribs and craters in cross sections, waviness in radial sections and “cloudy” structures in tangential sections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00632128
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  • 4
    Electronic Resource
    Electronic Resource
    Stemming the tide (1984)
    Springer
    Wood science and technology 18 (1984), S. 241-241 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00353358
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of high hydrostatic pressure on the crystal structure of BaFCl in the pressure range up to 6.5 GPa (1983)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 401-404 
    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/S0108768183002633
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  • 6
    Electronic Resource
    Electronic Resource
    Relationship between crystal structure and ionic conductivity in CuTeBr (1982)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 2361-2364 
    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/S0567740882008796
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  • 7
    Electronic Resource
    Electronic Resource
    A uniaxial stress apparatus for single-crystal X-ray diffraction on a four-circle diffractometer: application to silicon and diamond (1982)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 15 (1982), S. 148-153 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: An apparatus for applying uniaxial stress to a single-crystal has been constructed. The stress is produced by turning a differential screw and is measured by a strain gauge. The device fits on a goniometer of a four-circle diffractometer and can rotate around all three axes of the goniometer without restrictions. The lattice constants of Si stressed along [111] were measured and compared with ultrasonically measured elastic constants. The internal stress parameter ξ was calculated from changes of the intensity of the 600 reflection: ξ = 0.74 ± 0.04, larger than the value generally accepted (ξ = 0.64 ± 0.04). The implications of this unexpected result are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889882011698
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  • 8
    Electronic Resource
    Electronic Resource
    Statistical approaches for the treatment of anharmonic motion in crystals. I. A comparison of the most frequently used formalisms of anharmonic thermal vibrations (1982)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 563-568 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Several statistical approaches to anharmonic motion are known, but there exists no comparison between different formalisms. Therefore the most common formalisms (potential, Edgeworth and Gram-Charlier expansions and α formalism) are compared with each other in part I of this series of papers. Mathematical shortcomings of the potential and Edgeworth expansions may lead to doubtful interpretations of the corresponding probability densities and the potentials. The a formalism works inefficiently in conventional crystallographic refinement programs; it tends to converge badly and its computation is very time consuming. The best results of all are obtained for the Gram-Charlier expansion, which can be easily expanded to tensors up to sixth rank.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739482001211
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  • 9
    Electronic Resource
    Electronic Resource
    Anharmonic thermal vibrations and atomic potentials in lead fluoride (β-PbF2) as a function of temperature (1982)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 729-733 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Bragg intensities of β-PbF2 (with the cubic fluorite structure) have been measured in the step-scan mode up to sin θ/λ = 1.17 Å-1 at 295, 461 and 625 K by X-ray diffraction: a = 5.925 (2), 5.952 (2), 5.982 (4) Å, respectively; R = 0.013 for 103 reflections, 0.015 for 103 reflections, 0.018 for 106 reflections, respectively. The intensities were used for the refinement of anharmonic temperature factors up to third order for F- and up to sixth order for Pb2+. The temperature-factor formalism was based on the Gram-Charlier expansion. The probability density function (p.d.f.) of the F- and Pb2+ ions were calculated from the coefficients of the anharmonic temperature factors. The p.d.f. maps gave clear evidence that the Pb2+ ions do not carry out isotropic thermal motion. The atomic potentials of the Pb2+ ions (derived from the p.d.f. maps) indicate that the thermal motion of the excited Pb2+ ions is strongly influenced by the repulsion terms along the Pb2+-F- bonds. The F- ions carry out their largest thermal vibrations along 〈111〉 towards the centre of the elementary cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739482001466
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  • 10
    Electronic Resource
    Electronic Resource
    Statistical approaches for the treatment of anharmonic motion in crystals. II. Anharmonic thermal vibrations and effective atomic potentials in the fast ionic conductor lithium nitride (Li3N) (1982)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 568-576 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Results of X-ray diffraction experiments on lithium nitride (Li3N) in the temperature range between 294 and 888 K show strong anharmonic effects. The deviations from harmonicity cannot be interpreted by interstitial sites or split positions. The application of an anharmonic temperature factor which is based on the Gram-Charlier expansion leads to an excellent fit of the data, whereas an anharmonic temperature factor, based on the Edgeworth series expansion, cannot fit the measurements in a satisfactory way. The corresponding anharmonic probability densities and the effective one-particle potentials are presented. The activation energy of the ionic conduction in Li3N perpendicular to the c axis and the thermal expansion of the lattice constant are derived from the potentials. These results agree well with results obtained by other experimental techniques. Therefore it is concluded that the potentials derived from elastic scattering experiments are physically meaningful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739482001223
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