Two-dimensional composition diagram of the Al(OH)3-dien-HFaq.-ethanol system: Evidence of a new tetrahedral (Al4F18) polyanion |
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| Authors: | Karim Adil |
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| Institution: | Laboratoire des Oxydes et Fluorures, UMR CNRS 6010, Faculté des Sciences et Techniques, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 09, France |
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| Abstract: | Six domains appear in the 2D composition diagram of the Al(OH)3-dien-HFaq.-ethanol system at 190 °C and Al3+] = 1 mol L−1 under microwave heating. Four organic-inorganic fluorides crystallise: H3dien]·(AlF6) (P21/c, Z = 4), H3dien]2·(AlF5(H2O))3·2H2O (P21/n, Z = 4), H3dien]·(AlF6)·2H2O, which was previously known, and H3dien]2·(Al4F18) (C2/c, Z = 4). A new (Al4F18)6− polyanion, which results from the tetrahedral association of four AlF6 octahedra linked by corners, is evidenced in H3dien]2·(Al4F18). |
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| Keywords: | Hybrid fluorides Hydrothermal synthesis Microwave heating |
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