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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 581-585 
    ISSN: 0044-2313
    Keywords: New oxide of divalent iron ; structure ; MAPLE ; CHARDI ; VADI ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Oxoferrate with “Butterfly-Motiv”: K2Na4[Fe2O5]Dark red-brown single-crystals of K2Na4[Fe2O5] were obtained for the first time by heating “K3Na3CdO4” at 500°C in closed Fe-cylinders. Determination and refinement of the crystal structure confirms the space group P42/mnm (No. 136). Four-circle diffractometer data: MoKα, 373 out of 373 Io(hkl); R = 5.3%; Rw = 4.6%; a = 645.94(5), c = 1 039.2(1) pm.In contrast to the already known oxoferrates(II) with the “Butterfly-Motiv”, Rb6[Fe2O5] and K6[Fe2O5] [1], we now found an isotypic structure for K2Na4[Fe2O5] with the oxocobaltates of Rb2Na4[Co2O5] and K2Na4[Co2O5] [2].
    Notes: Dunkel-rotbraune Einkristalle von K2Na4[Fe2O5] wurden erstmals durch Reaktion mit der Gefäßwand beim Tempern von „K3Na3CdO4“ in verschlossenen Fe-Zylindern bei 500°C erhalten. Die Strukturaufklärung (Vierkreisdiffraktometerdaten: MoKα; 373 von 373 Io(hkl); R = 5,3%; Rw = 4,6%; a = 645,94(5), c = 1 039,2(1) pm) belegt die Raumgruppe P42/mnm (Nr. 136).Im Gegensatz zu den bisher bekannten Oxoferraten(II) mit „Butterfly-Motiv“ Rb6[Fe2O5] und K6[Fe2O5] [1] wird hier eine zu den Oxocobaltaten Rb2Na4[Co2O5] und K2Na4[Co2O5] [2] isotype Struktur gefunden.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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