Phosphorus Research Bulletin
Online ISSN : 1882-2363
Print ISSN : 0918-4783
ISSN-L : 0918-4783
ARCHITECTURE OF CRYSTALLINE ULTRAPHOSPHATES
DÖRTE STACHELANNETT OLBERTZ
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2002 Volume 14 Pages 15-22

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Abstract

Ultraphosphate structures are polymeric and consist of the anion framework and the cations between. But, the anion framework strongly depends on the cations, their charge, size, and value. Some selection rules exist, which point out the number of possible structure bonds related to the number and charge of the cations. Concerning anion framework, there exist discrete cyclic units as well as ribbons and layer structures with different ring sizes, number of connecting {PO4} tetrahedra and connection possibilities. The cations are isolated from the others within the frameworks because of their low content. But, when the cations were connected each other with thinkable bonds, we get a detailed insight into the structure interactions between anion configurations and the cations between. In all evaluated crystalline ultraphosphate structures, the cations have 6 cations “around” to form octahedra with different distances and symmetries from one cation to the next neighboured one. The so-called repeatable units seem to depend on the complexity of the anionic framework: the more complex the anionic structure, the less complicate the cationic relations, and reversed. This means, that ultraphosphate structures possess strong relations between the {PO4} groups and the cations. The result are complex interconnecting structures.

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© Japanese Association of Inorganic Phosphorus Chemistry
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