Synthesis and Crystal Structure Determination of Cs3Mg2P6O17N: The First Example of a Nitrido-Oxo-Cyclohexaphosphate

The synthesis of a new nitrido-oxo-phosphate, Cs3Mg2P6O17N, has been performed by thermal ammonolysis of a mixture of CsPO3, MgO, and NH4H2PO4, and its crystal structure was determined from single-crystal data. The unit cell is cubic [space group Pa3 (Z=4)] with a=12.239(1) Å. The structure consists...

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Bibliographic Details
Published in:Journal of solid state chemistry 2000-08, Vol.153 (1), p.185-191
Main Authors: Feldmann, W., L'Haridon, P., Marchand, R.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
cyclohexaphosphate
Exact sciences and technology
Inorganic compounds
oxynitride
Physics
Salts
structure
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:The synthesis of a new nitrido-oxo-phosphate, Cs3Mg2P6O17N, has been performed by thermal ammonolysis of a mixture of CsPO3, MgO, and NH4H2PO4, and its crystal structure was determined from single-crystal data. The unit cell is cubic [space group Pa3 (Z=4)] with a=12.239(1) Å. The structure consists of discrete cyclic arrangements of six P(O,N)4 tetrahedra sharing two corners, thus forming large [P6O17N]7− macroanions. These independent cyclic units are linked together through octahedrally coordinated magnesium atoms, while cesium atoms occupy large cavities of the cyclohexaphosphate network and insure the electrical neutrality. Nitrogen atoms are randomly distributed with oxygen in a bridging P-(O,N)-P anionic position. Cs3Mg2P6O17N is a first term of a series of nitrogen-containing cyclohexaphosphates including the isotypic cesium oxynitrides Cs3Fe2P6O17N and Cs3Co2P6O17N.
ISSN:0022-4596
1095-726X
DOI:10.1006/jssc.2000.8776