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Synthesis and Structure of Sodium Tetraoxo Nitrido Molybdate, Na5

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Synthesis and Structure of Sodium Tetraoxo Nitrido Molybdate, Na

5

MoO

4

N

Nachiappan Arumugam, Eva M. Peters, and Martin Jansen

Max-Plank-Institut f¨ur Festk¨orperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany Reprint requests to Prof. Dr. M. Jansen. Fax: +49-(0)711-6891502. E-mail: m.jansen@fkf.mpg.de Z. Naturforsch. 59b, 274 – 276 (2004); received December 22, 2003

The new oxynitride of molybdenum, Na5MoO4N was prepared from stoichiometric mixtures of the starting materials MoO2, Na2O2and NaN3which were heated in a special regime up to 500◦C, and cooled down slowly. Its crystal structure was solved and refined from single crystal data (orthorhom- bic, Cmcm, a=991.1(2), b=574.3(1), c=1067.7(2)pm, R1=0.0153, wR2=0.0427). The struc- ture consists of isolated [MoO4N]5−rectangular pyramids which are separated by Na+cations. This compound is structurally related to Na5WO4N which crystallizes in space group Cmc21.

Key words: Sodium, Molybdenum, Oxynitrides, Structure Determination

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