The thermal stability of the gallophosphate cloverite

Schmidt, W.; Schüth, F.; Kallus, S.

doi:10.1016/S0167-2991(97)80628-3

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The thermal stability of the gallophosphate cloverite

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Schmidt, W.
Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Institut für Anorganische Chemie und Analytische Chemie, Johann Wolfgang Goethe-Universität, Marie Curie-Straße 11, D-60439 Frankfurt, Germany;

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Schüth, F.
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Institut für Anorganische Chemie und Analytische Chemie, Johann Wolfgang Goethe-Universität, Marie Curie-Straße 11, D-60439 Frankfurt, Germany;

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引用

Schmidt, W., Schüth, F., & Kallus, S. (1997). The thermal stability of the gallophosphate cloverite. Studies in Surface Science and Catalysis, 105, 771-778. doi:10.1016/S0167-2991(97)80628-3.

引用: https://hdl.handle.net/11858/00-001M-0000-0024-05F8-6

要旨

The thermal stability of cloverite, [Ga₈P₈O₃₁(OH)₂](QF)₂(H₂O)_n, was studied by in situ x-ray diffraction (XRD), in situ infrared spectroscopy (IR), thermogravimetric analysis combined with differential thermal analysis (TG/DTA) and nitrogen adsorption measurements. During the heating process the framework remained stable to at least 500°C in air as well as in vacuum. Cooling down to room temperature in ambient air led to a structure break down, while under vacuum the cloverite structure remained stable during the cooling process. When the calcined cloverite is kept at temperatures above 100°C its framework remains intact while storage under aliphatics produces a material similar to cloverite.