[H4tren]3/2·(Al6F24)·3H2O,the most condensed fluoride in the Al(OH)3-tren-HFaq.-ethanol system |
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| Institution: | 1. Laboratoire des Oxydes et Fluorures, UMR 6010 CNRS, Faculté des Sciences et Techniques, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France;2. Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint Quentin-en-Yvelines, 45 Avenue des Etats Unis, 75035 Versailles Cedex, France |
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| Abstract: | The most condensed crystalline fluoride that appears in the Al(OH)3-tren-HFaq.-ethanol system at 190 °C is found to be H4tren]3/2·(Al6F24)·3H2O. The structure is monoclinic, P21/c, with a = 21.939(1) Å, b = 6.7180(2) Å, c = 23.329(1) Å, β = 111.324(2)°. ∞(Al6F24) chains result from the connection of (Al7F30)9− polyanions by opposite AlF6 octahedra. Hydrogen bonds are established between the ∞(Al6F24) chains and ordered or disordered H4tren]4+ cations and water molecules. |
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