Synthesis and crystal structure of new phosphate NaFe
4
2+
Fe
3
3+
[PO4]6 |
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Authors: | E L Belokoneva E A Ruchkina O V Dimitrova |
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Institution: | (1) Faculty of Geology, Moscow State University, Leninskie gory, Moscow, 119992, Russia |
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Abstract: | New sodium iron orthophosphate NaFe 4 2+ Fe 3 3+ PO4]6 was synthesized by the hydrothermal method. The crystal structure (sp. gr. $P\bar 1$ ) was established by the heavy-atom method, with the exact chemical formula of the compound being unknown; R hkl = 0.0492, R whkl = 0.0544, S = 0.52. The new compound is analogous to iron phosphate Fe 3 2+ Fe 4 3+ PO4]6 studied earlier. However, these two compounds differ in the Fe2+ and Fe3+ contents, because Na+ ions in the new compound are located at the centers of symmetry not occupied earlier. |
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Keywords: | |
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