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

✍ Scribed by W. Feldmann; P. L'Haridon; R. Marchand

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 260 KB
• Volume: 153
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8776

✦ Synopsis

The synthesis of a new nitrido-oxo-phosphate, Cs 3 Mg 2 P 6 O 17 N, has been performed by thermal ammonolysis of a mixture of CsPO 3 , MgO, and NH 4 H 2 PO 4 , 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) A > . The structure consists of discrete cyclic arrangements of six P(O,N) 4 tetrahedra sharing two corners, thus forming large [P 6 O 17 N] 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. Cs 3 Mg 2 P 6 O 17 N is a 5rst term of a series of nitrogencontaining cyclohexaphosphates including the isotypic cesium oxynitrides Cs