Synthese und Struktur eines Caesiumoxonitridomonowolframates(VI), Cs7[WN1,5O2,5]2 |
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Authors: | H Stegen H Jacobs |
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Abstract: | Synthesis and Crystal Structure of a Cesium Oxo Nitrido Monotungstate(VI), Cs7WN1.5O2.5]2 Mixtures of tungsten powder and WO3 react with an excess of CsNH2 in autoclaves at 650 °C to yield hygroscopic yellow crystals of cesium oxo nitrido tungstate(VI) Cs7WN1.5O2.5]2 besides Cs6W2N4O3] 1]. After the reaction the crystals are embedded in cesium metal (from thermal decomposition of CsNH2), which was washed out by liquid ammonia. The crystals allowed a successful X‐ray structure determination. Cs7WN1.5O2.5]2 crystallizes in the space group P21/c with the lattice parameters a = 6.766(1) Å, b = 11.205(3) Å, c = 22.299(4) Å, β = 91.05(1)° and Z = 4. The crystal structure is built up by isolated tetrahedra WX4] with X = N, O, which are separeted by cesium cations. |
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Keywords: | Tungstates(VI) Cesium oxo nitrido mono tungstate(VI) High‐pressure synthesis Crystal structure |
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