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- W2146456477 abstract "Rb6[Fe2O5] und K6[Fe2O5] wurden erstmals durch Tempern inniger Gemenge von “Rb6CdO4” mit CdO (im Verhältnis 1 : 1,1) bzw. KO0,48 mit CdO (im Verhältnis 5,9 : 1) in verschlossenen Fe-Zylindern in Form von roten Einkristallen erhalten. Die Strukturaufklärung (Vierkreisdiffraktometerdaten, Rb6[Fe2O5]: Ag Kα, 720 von 1 220 Io(hkl), R = 9,68%, Rw = 6,09%; K6[Fe2O5]: Mo Kα, 1 214 von 1 214 Io(hkl), R = 3,20%, Rw = 2,48%) belegt die Raumgruppe C2/m. Rb6[Fe2O5]: a = 718,9 pm, b = 1183,1 pm, c = 695,4 pm, β = 95,05°, Z = 2. K6[Fe2O5]: a = 691,21 pm, b = 1 142,78 pm, c = 665,50 pm, β = 93,82°, Z = 2. Zum ersten Male wird bei derartigen Ferraten eine deutlich gewinkelte Baueinheit [Fe2O5]6− beobachtet, wie sie analog bei Na6[Be2O5] vorliegt. New Oxides with the “Butterfly-Motive”: Rb6[Fe2O5] and K6[Fe2O5] Rb6[Fe2O5] and K6[Fe2O5] were obtained for the first time by annealing intimate mixtures of “Rb6CdO4” with CdO (molar ratio 1 : 1.1) and KO0.48 with CdO (molar ratio 5.9 : 1) respectively in closed Fe-cylinders. Determination and refinement of the crystalstructure confirms the space group C2/m (four-circle-diffractometer data). Rb6[Fe2O5]: Ag Kα, 720 out of 1220 Io(hkl), R = 9.68%, Rw = 6.09%; a = 718.9pm, b = 1183.1 pm, c = 695.4pm, β = 95.05°, Z = 2; K6[Fe2O5]: MoKα, 1214 Out of 12141o(hkl), R = 3.20070, Rw = 2.48%, a = 691.21 pm, b = 1142.78pm, c = 665.50pm, β = 93.82°, Z = 2. The binuclear unit [O2FeOFeO2]6− already known to be planar with oxoferrates(II) now was observed to be angular here and closely related to Na6[Be2O5]." @default.
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- W2146456477 date "1992-12-01" @default.
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- W2146456477 title "�ber Oxide mit dem ?Butterfly-Motiv?: Rb6[Fe2O5] und K6[Fe2O5]" @default.
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- W2146456477 doi "https://doi.org/10.1002/zaac.19926180112" @default.
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