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  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure of nickel selenide - Ni3Se2 (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 289 (1957), S. 203-206 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The crystal structure of Ni3Se2 has been determined from the X-ray powder diffraction pattern. The unit cell is rhombohedral with a = 4.24 Å, α = 90°38.6′, Z = 1, and space group R 32, D37. The observed and calculated intensities agree for the following arrangement - 2 Se at \documentclass{article}\pagestyle{empty}\begin{document}$ \frac{1}{4}\frac{1}{4}\frac{1}{4},\,\frac{3}{4}\frac{3}{4}\frac{3}{4} $\end{document} and 3 Ni at \documentclass{article}\pagestyle{empty}\begin{document}$ \frac{1}{2}\frac{1}{4}\frac{3}{4},\,\frac{3}{4}\frac{1}{2}\frac{1}{4},\,\frac{1}{4}\frac{3}{4}\frac{1}{2} $\end{document}.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572890117
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  • 2
    Electronic Resource
    Electronic Resource
    Ein Fehlstellenüberstruktur-Modell für γ-Fe2O3 (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 293 (1957), S. 228-232 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Auf Grund magnetischer und röntgenographischer Untersuchungen wird eine Fehlstellenüberstruktur für □-Fe2O3 entwickelt. Bei kubischer Symmetrie, Raumgruppe P43m, Td1, ist ein Eisen(III)-ion auf ½½½ von 4 Leerstellen auf Oktaederplätzen umgeben. Mit einem halben Mol Konstitutionswasser pro Elementarzelle ergibt sich die Formel Fe83+ [Fe123+ □ 4] Fe3+ (OH)-O312-.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572930310
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