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  • 1
    Electronic Resource
    Electronic Resource
    Internal reduction of (Mg, Ni) O: Effect of a NiO-Concentration gradient (1987)
    Springer
    Physics and chemistry of minerals 14 (1987), S. 238-244 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract Single crystals of (Mg, Ni) O with a Ni-concentration gradient from the outer surface to the interior have been reduced so that metallic nickel particles precipitate in the wüstite matrix. The internal reduction morphology is very different from the one observed in reduced homogeneous (Mg, Ni) O single crystals: pores develop and the precipitates grow along preferential crystallographic directions. The addition of iron ions to the inhomogeneous mixed oxide crystals suppresses the porosity. The observations are described and discussed in terms of point defects and transport kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307988
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structural width of low-angle grain boundaries in olivine (1983)
    Springer
    Physics and chemistry of minerals 9 (1983), S. 133-138 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract Electron diffraction and imaging techniques have been used to examine the structure and thickness of low-angle grain boundaries in olivine. For edge-on grain boundaries, a periodic array of dislocations in a boundary gives rise to sets of periodic rods of diffracted intensity that are recorded as streaks in the diffraction pattern. The length of these streaks provides a measure of the structural width of a boundary. For olivine, the structural width of a boundary with a given dislocation spacing is three to four times smaller than that in metals where the boundary width is approximately equal to the spacing between dislocations in the boundary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308370
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    Paper (German National Licenses)
    Fulltext
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