A comparative crystal chemical analysis of Ba2CoO4 and BaCoO3 |
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| Institution: | 1. Departmento de Quı́mica Inorgánica, Facultad de Ciencias Quı́micas, Universidad Complutense, E-28040-Madrid, Spain;2. Instituto de Quı́mica-Fisica Rocasolano, CSIC, Serrano 119, E-28006-Madrid, Spain;1. National Institute of Aquatic Resources (DTU Aqua), Technical University of Denmark, Jægersborg Allé 1, 2920 Charlottenlund, Denmark;2. Nørrebrogade 52a, 5th, 2200 Copenhagen N, Denmark;1. Division of Fuel Cells, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Shandong University of Science and Technology, 579 Qianwangang Road, 266590, China |
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| Abstract: | Polycrystalline Ba2CoO4 has been synthesized by the ceramic method. X-ray and electron diffraction shows this phase to be monoclinic with a=5.8878(4); b=7.6158(6); c=10.3916(8); β=90.738(2). This compound is isostructural to Ba2TiO4 and the structure has been refined from X-ray powder diffraction data by using the Rietveld method. High resolution images interpreted in comparison to simulated images confirm the structure determined by X-ray diffraction. A crystal chemical study based on the cation arrays allows to establish a new relationship between Ba2CoO4 and 2H BaCoO3. Moreover, the Ba subarray seems to be related to the structure of elemental Ba. |
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