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On the Knowledge of RbTaO3 – a New Type of a Layer Structure RbTaO3 crystallizes monoclinic with a = 9.589, b = 8.505, c = 8.135 Å, β = 94.87°, Z = 8, space group C2/m. The crystal structure (Fourcircle-diffractometer data, 4° ≤ Θ ≤ 33°, 1014 hkl, MoKα, R = 9,9%) shows sheets [TaO3] connected by Rb; one half of Ta is surrounded by O octahedrally, the other part tetragonal-pyramidal. Effective Coordination Numbers, ECoN, and the Madelung Part of Lattice Energy, MAPLE, have been calculated and are discussed. 相似文献
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