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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Redetermination of the K2CuF4 StructureThe structure of K2CuF4 was redetermined by x-rays. An enlarged tetra-gonal unit cell of dimensions a = 5.858, c = 25.42 Å was found. The refinement in spacegroup D102d-I4c2 yielded R = 0.06. Contrary to former findings the JAHN-TELLER- distortion of the CuF6-octahedra corresponds to a tetragonal elongation with distances Cu-F = 1.92 Å (4 ×) and 2.22 Å(2×).
    Notes: Die röntgenographische Neubestimmung ergab für die K2CuF4- Struktur eine Vergrößerung der tetragonalen Elementarzelle auf die Gitterabmessungen a = 5,858, c = 25,42 Å. In der Raumgruppe D102d-I4c2 ließ sich die Struktur bis R = 0,06 verfeinern. Im Gegensatz zu früheren Befunden erweist sich die JAHN-TELLER-Verzerrung CuF6-Oktaeder jetzt auch hier als gestreckt. Im Rahmen der Bestimmungsgenauigkeit sind alle Oktaeder tragonal mit Abständen Cu-F = 1,92 Å (4×) und 2,22 Å (2×).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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