Über Hexagonale Perowskite mit Kationenfehlstellen. XI. Die Stapelvariante Ba6W4□2O18 |
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Authors: | S. Kemmler-Sack |
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Abstract: | On Hexagonal Perovskites with Cationic Vacancies. XI. Stacking Polytype Ba6W4□2O18 The white Ba6W4□2O18, with a cation/vacancy ratio of 2:1 for the octahedral holes, is the first representative of a new stacking polytype for this formula type. It crystallizes in a rhombohedral six layer-structure with ahex = 10.130 Å chex = 13.960 Å Z = 3 (ρexp = 7.38 g/cm3; ρcalc = 7.418 g/cm3). |
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