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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 370 (1969), S. 160-170 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The elements of the 1b-group of the periodic system (M) react with Li and the elements Si, Ge and Sn(X) forming compounds of the formula LiM2X and/or Li2MX. The deeply coloured phases crystallize in a fcc lattice; lattice constants see “Inhaltsübersicht”.The crystal structure of the phases LiCu2Si and LiCu2Ge is that of a HEUSLER-type lattice (L2, A), the Li2 CuSn-structure is an alternative Li3Bi-type structure (L21C).The phase boundaries within the limits LiM2X and Li2MX were investigated. The optical absorption maxima of the compounds were determined. The electrical resistance of the phases increases with temperature. The Cu compounds are slightly diamagnetic.
    Notes: Die Elemente der Kupfergruppe (M) bilden mit Li und den Elementen Si, Ge und Sn(X) Verbindungen der Zusammensetzung LiM2X und/order Li2MX. Die intensiv farbigen Stoffe kristallisieren kubisch-flächenzentriert mit folgenden Gitterkonstanten: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm LiCu}_2 {\rm Si}\,\,\quad {\rm a} = 5,77_6 \,{\rm {\AA}}} \hfill & {} \hfill \\ {{\rm LiCu}_2 {\rm Ge}\quad {\rm a} = 5,89_2 \,{\rm {\AA}}} \hfill & {{\rm Li}_{2} {\rm CuGe}\quad {\rm a} = 5,96_8 \,{\rm {\AA}}} \hfill \\ {} \hfill & {{\rm Li}_{2} {\rm CuSn}\quad {\rm a} = 6,26_2 \,{\rm {\AA}}} \hfill \\ {{\rm LiAg}_{2} {\rm Sn}\quad {\rm a} = 6,59_9 \,{\rm {\AA}}} \hfill & {{\rm Li}_{2} {\rm AgSn}\quad {\rm a} = 6,56_5 \,{\rm {\AA}}} \hfill \\ {} \hfill & {{\rm Li}_{2} {\rm AuSn}\quad {\rm a} = 6,41_7 \,{\rm {\AA}}{.}} \hfill \\\end{array} $$\end{document} LiCu2Si und LiCu2Ge haben die Kristallstruktur der HEUSLER-Phasen (L21A-Typ); Li2CuSn kristallisiert in einer modifizierten Li3Bi-Struktur (L21C-Typ).Das Homogenitätsgebiet der Phasen zwischen den Grenzen LiM2X und Li2MX wurde untersucht. Aus Remissionsspektren wurden die Absorptionsmaxima ermittelt. Der elektronische Widerstand der Stoffe steigt mit Temperaturerhöhung an. Die Verbindungen des Kupfers sind schwach diamagnetisch.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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