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  • 1
    ISSN: 0044-2313
    Keywords: New basic Oxoindate(III): Na26O3[InO4]4 ; Structure ; MAPLE ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Basic Oxoindate: Na26O3[InO4]4For the first time Na26O3[InO4]4 was obtained by annealing intimate mixtures of Na2O, CdO and elemental In (molar ratio 3.5:1.0:2.0) in closed Ni-cylinders (30 days, 600°C) in form of yellow single crystals. The structure determination by four circle diffractometer data (MoKα, 921 out of 921 Io(hkl), R = 2.53, Rw = 2.18%) confirms the space group 143d (cubic) with a = 1 427.37 pm and Z = 4. All kation are surrounded by tetrahedron of O2-. In3+ is coordinated with O(1) and O(2) (without O(3)) only. There are „isolated“ [InO4]-tetrahedra. The Madelung Part of Lattice Energy, MAPLE, the Mean Fictive Ionic Radii, MEFIR, Effective Coordination Numbers, ECoN, and Charge Distribution, CHARDI, are calculated.
    Notes: Beim Tempern inniger Gemenge von Na2O, CdO und elementarem In (3,5:1,0:2,0) in verschlossenen Ni-Zylindern (30 Tage, 600°C) erhielten wir gelbe Einkristalle von Na26O3[InO4]4. Die Strukturaufklärung (Vierkreisdiffraktometerdaten, MoKα, 921 von 921 Io(hkl), R = 2,53, Rw = 2,18%) erfolgte in der Raumgruppe 143d (kubisch) mit a = 1 427,37 pm und Z = 4. Alle Kationen sind tetraedrisch von O2- umgeben; In3+ jedoch nur von O(1) und O(2) und nicht von O(3). Strukturcharakteristisch sind die „Inseln“ [InO4], auffallend die C.N. 8 für O(3). Der Madelunganteil der Gitterenergie, MAPLE, die Mittleren Fiktiven Ionenradien, MEFIR, Effektive Koordinationszahlen, ECoN, sowie die Ladungsverteilung, CHARDI, werden berechnet.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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