Zur Kenntnis der Oxocobaltate(II) Na4[CoO3], ein Nesocobaltat(II) |
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Authors: | W Burow R Hoppe |
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Abstract: | On the Knowledge of Oxocobaltates(II). Na4CoO3], the First Nesocobaltate(II) Newly prepared transparent, blood red single crystals of Na4CoO3] (Na2O/?CoO’? Na:Co = 4.4:1, cobalt tube, 550°C, 20d, dry argon), crystallize triclinically, P1, a = 8.144, b = 6.220, c = 5.758 Å; α = 117.5, β = 89.9, γ = 111.2 (diffractometer data), Z = 2. There are carbonate-like, isolated CoO3] groups, respectively parameters and distances see text. 2358 symmetry independent reflections (automatical four cycle diffractometer PW 1100, Mo–Kα, graphite monochromator, 4° ? Θ ? 36°), R = 0.0597. The Madelung Part of the Lattice Energy, MAPLE, Effective Coordination Numbers, ECoN and Mean Fictive Ionic Radii, MEFIR are calculated and discussed. |
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