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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 582 (1990), S. 111-120 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Single Crystal Syntheses of Semimetal Complex Fluorides: without Solvents Li2[GeF6] and Na2[GeF6]For the first time we obtained colourless single crystals of Li2GeF6 and Na2GeF6 in a sealed copper tube by reaction of CuF2 with Ge powder of LiF or NaF without solvent. The crystal structure is redeterminated with R = 3.5% and Rw = 3.5% for Li2GeF6 and R = 9.2% and Rw = 6.1% for Na2GeF6. The compounds crystallize isotypic to Na2SiF6 in the space group P321, Z = 3 [Li3GeF6: a = 840.4(1) pm; c = 461.6(1) pm; Fourcircle Diffractometer Siemens AED 2; MoK\documentclass{article}\pagestyle{empty}\begin{document}$ \bar \alpha $\end{document}; 850 Io(hkl) - Na2GeF6: a = 905.8(1) pm; c = 510.7(1) pm; Fourcircle Diffractometer Philips PW 1100; AgK\documentclass{article}\pagestyle{empty}\begin{document}$ \bar \alpha $\end{document}; 1056 Io(hkl)]. The Madelung Part of Lattice Energy, MAPLE, is calculated and compared with MAPLE of the binary components and Cs3GeF7 supplementarily.
    Notes: Erstmals wurden auf „trockenem Wege“ durch Umsetzung von CuF2 mit Ge-Pulver in Gegenwart von LiF bzw. NaF in verschlossenen Cu-Bömbchen farblose Einkristalle von Li2GeF6 erhalten und die Kristallstrukturen verfeinert. Sie kristallisieren isotyp zu Na2SiF6 trigonal, Raumgruppe P321, Z = 3 (a = 840,4(1) pm; c = 461,6(1) pm für Li2GeF6, a = 905,8(1) pm; c = 510,7(1) pm für Na2GeF6). [Li2GeF6: Vierkreisdiffraktometer AED 2, FA. Siemens, MoK\documentclass{article}\pagestyle{empty}\begin{document}$ \bar \alpha $\end{document}, 850 Io(hkl), R = 3,5%, Rw = 3,5%; Na2GeF6: Vierkreisdiffraktometer PW 1100, Fa. Philips, AgK\documentclass{article}\pagestyle{empty}\begin{document}$ \bar \alpha $\end{document}, 1056 Io (hkl), R = 9,2%, Rw = 6,1%]. Der Madelunganteil der Gitterenergie, MAPLE, von Li2GeF6 bzw. Na2GeF6 werden berechnet und mit denen der binären Komponenten sowie mit denen von Cs3GeF7 [2] verglichen.
    Additional Material: 12 Tab.
    Type of Medium: Electronic Resource
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